Tài Liệu Đề Cương Ôn Tập Môn Linh Kiện Điện Tử

CNG N TP MN LINH KIN IN T

CNG N TP MN LINH KIN IN TI.PHN TRC NGHIM

Hc sinh, sinh vin chn cu tr li ng nht cho cc cu sau:

1.Mt nguyn t trung ha in khi nguyn t c:a.S lng proton ln hn s lng electron

b.S lng proton nh hn s lng electron

c.S lng proton bng s lng electron

d.C ba cu u sai

2.Mt nguyn t khi khng cn bng in th tr thnh ion:

a.Ion dng khi s lng proton nh hn s lng electronb.Ion m khi s lng proton nh hn s lng electron

c.Cu a v b u ngd.

3.Cc ht mang in tng tc nhau:a.Cc ht tri du y nhaub.Cc ht cng du y nhau

c.Cc ht tri du ht nhaud.Ch c cu a sai

4.Electron l ht:a.Khng mang in tchb.Mang in tch dngc.Mang in tch md.Ch c cu a sai5.Proton l ht:a.Mang in tch dngb.Mang in tch mc.Khng mang in tchd.Ch c cu a ng6.Hiu in th gia hai u on mch AB l UAB:

a.UAB = VA - VBb.UAB = VB - VAc.Cu a ng b said.Cu a sai b ng7.in tr l mt linh kin:a.Tch ccb.Th ng

c.Dng tng dng ind.Khuch i in p8.in tr dy dn:a.T l thun vi tit din ca dyb.T l nghch vi tit din ca dy

c.Khng ph thuc tit din ca dyd.Bng tit din ca dy9.Biu thc ca nh lut Ohm cho on mch l:a.

b.

c.

d.

10.in tr quang l mt linh kin:a.Thay i tr s khi tng nhit b.Thay i tr s khi gim nhit c.Thay i tr s khi gim in pd.C 3 cu u sai11.LDR (Light Dependent Resistor) l loi linh kin c:

a.Tr s dng in lun lun tngb.Tr s in p lun lun gimc.Tr s in tr thay i ph thuc nh sng chiu vo n

d.Tr s in tr thay i ph thuc in p t vo n12.Nhit tr l in tr c tr s:a.Lun lun tng theo nhit b.Lun lun gim theo nhit 13.Nhit tr m NTC (Negative Temperature Coefficient) l nhit tr c tr s in tr:a.Tng khi nhit tngb.Gim khi nhit gimc.Tng khi nhit gimd.Khng i khi nhit thay i14.Nhit tr dng PTC (Positive Temperature Coefficient) l nhit tr c tr s in tr:a.Khng i khi nhit thay ib.Gim khi nhit tngc.Tng khi nhit gimd.Tng khi nhit tng15.Hai in tr R1, R2 ghp ni tip, in tr tng ng ca chng:a.

b.

c.

d.C 3 cu u sai16.Hai in tr R1, R2 ghp song song, in tr tng ng ca chng:

a.

b.

c.

d.C 3 cu u sai17.in tr R1=100K, R2=2K2 ghp ni tip, in tr tng ng ca chng:a.220Kb.202Kc.102K2d.C 3 cu u sai18.in tr tng ng ca hai in tr mc song song R1=R2=100K:a.100Kb.200Kc.50Kd.C 3 cu u sai19.in tr tng ng ca ba in tr mc song song vi R1=R2=R3=3K3 l:

a.3K3b.330

c.110d.110020.Vi in tr ba vng mu th vng th ba ch:a.S tng ng vi mub.Sai s

c.S s 0 thm vod.Nhit

21.Vi in tr 4 vng mu th vng th t ch:

a.Sai sb.S tng ng vi muc.in p chu ngd.C 3 cu u sai22.Vi in tr 5 vng mu th vng th hai ch:

a.Sai sb.Nhit

c.S s 0 thm vod.S tng ng vi mu

23.Vi in tr 5 vng mu th vng th t ch:

a.S s 0 thm vob.Sai sc.in p chu ng cd.S tng ng vi mu24.Vi in tr 5 vng mu th vng th ba ch:

a.Sai sb.S tng ng vi mu

c.S s 0 thm vod.C 3 cu u sai25.Vi in tr ba vng mu th vng th hai ch:a.S s 0 thm vob.Sai s

c.in p chu ng cd.S tng ng vi mu

26.Vi in tr 4 vng mu th vng th ba ch:

a.Nhit b.Dng in cc ic.Sai sd.S s 0 thm vo

27.Vi in tr 5 vng mu th vng th nm ch:

a.S s 0 thm vob.S tng ng vi mu

c.Sai sd.Nhit

28.in tr ba vng mu: --, gi tr in tr l:a.2200b.220

c.222d.C 3 cu u sai

29.in tr 4 vng mu: lc-lam-cam-vng nh, gi tr in tr l:a.560b.56K

c.5K6d.C 3 cu u sai

30.in tr 5 vng mu: nu-en-en-en-nu, gi tr in tr l:a.100b.1000

c.10d.C 3 cu u sai

31.in tr 4 vng mu: cam-cam-cam-bc, gi tr in tr l:

a.330b.330K

c.3K3d.C 3 cu u sai32.Mt on mch in c hai in tr R1 v R2 ghp song song th:a.Nu R1>R2 th I1>I2 (I1, I2 l dng qua R1, R2)

b.Nu R1I2c.Nu R1>R2 th U1>U2 (U1, U2 l hiu in th gia hai u R1, R2)

d.Nu R1 VK th diode c:

a.Phn cc thunb.Phn cc nghchc.Cu a ng, b said.Cu a sai, b ng85.Khi phn cc thun diode c dng in chy theo chiu:

a.T A v Kb.T K v Ac.Cu a v b u ngd.Cu a v b u sai86.Khi phn cc nghch diode c dng in r chy theo chiu:

a.T K v Ab.T A v Kc.Cu a v b u ngd.Cu a v b u sai87.Diode Zener dng n p ta phi:

a.Phn cc thun diodeb.Khng phn ccc.Phn cc nghch dioded.C ba cu u sai88.Diode Zener ch n p c mc in p:a.5Vb.12Vc.6Vd.C ba cu u sai

89.Diode Varicap l diode:

a.Bin dungb.Zenerc.Photodioded.LED90.Diode trong UJT c nn N th cc E tng ng l:

a.Cc Kb.Cc A

c.Cu a ng, b said.Cu a sai, b ng91.Diode c in tr thun bng in tr nghch = 0 th:

a.Diode ttb.Diode b ni tt

c.Diode b td.C ba cu u sai92.Diode cm quang l diode:

a.Pht sngb.Cm nhn nh sng

c.Varicapd.Zener93.Diode Zener dng :a.Pht quangb.Tch sngc.n pd.C ba cu u sai94.Diode trong UJT c my tip gip:

a.1 tip gipb.2 tip gipc.3 tip gipd.4 tip gip95.LED 7 on gm:

a.7 LED ghp anod chungb.7 LED ghp catod chungc.7 LED ghp song songd.Cu a v b ng

96.LED l diode:

a.Ch pht ra nh sng mu trngb.Ch pht ra nh sng mu

c.Ch pht ra nh sng mu xanhd.C ba cu u sai97.Mch chnh lu bn k vi in AC c tn s 50Hz th tn s dn sng ng ra l:

a.50Hzb.25Hzc.100Hzd.75Hz98.Mch chnh lu ton k vi in AC c tn s 50Hz th tn s dn sng ng ra l:a.50Hzb.100Hz

c.25Hzd.75Hz99.Mch chnh lu ton k dng cu diode, trong s dng:

a.2 diode chnh lub.1 diode chnh luc.3 diode chnh lud.4 diode chnh lu100.Khi LED 7 on hin th s 6 th:a.Tt c 7 LED u sngb.Tt c 7 LED u sng tr LED g ttc.6 LED sng, 1 LED b ttd.C ba cu u sai101.Khi LED 7 on hin th ch E th:

a.Tt c 7 LED u sngb.6 LED sng, 1 LED ttc.5 LED sng, 2 LED b v c ttd.C ba cu u sai102.Mch chnh lu l mch:

a.Khuch i dng inb.Khuch i in pc.Cu a v b ngd.Cu a v b sai103.BJT c cu to gm:

a.Mt mi ni P-Nb.Hai mi ni P-N

c.Ba mi ni P-Nd.Bn mi ni P-N104.Khi transistor PNP dn, a s electron s :a.T C n Eb.T E n Cc.Cu a v b u ngd.C ba cu u sai105.Khi transistor NPN dn, a s electron s :

a.T C n Eb.T E n Cc.Cu a v b u ngd.C ba cu u sai106.iu kin transistor NPN dn l:

a.VB>VE>VCb.VC>VB>VEc.VC>VE>VBd.VE>VB>VC107.Transistor mc kiu cc pht chung c gi l mc kiu:a.CCb.CEc.CBd.C ba cu u ng108.Transistor mc kiu cc nn chung c gi l mc kiu:

a.CCb.CBc.CEd.C ba cu u sai

109.Transistor mc kiu cc thu chung c gi l mc kiu:

a.CCb.CBc.CEd.CS

110.Khi transistor mc kiu CE th tn hiu ng ra so vi tn hiu ng vo l:

a.Cng phab.o pha

c.Cu a v b u ngd.Cu a v b u sai111.Khi transistor mc kiu CB th tn hiu ng ra so vi tn hiu ng vo l:a.Cng phab.o phac.Cu a ng, b said.Cu a sai, b ng112.Khi transistor mc kiu CC th tn hiu ng ra so vi tn hiu ng vo l:a.o phab.Cng pha

c.Cu a v b u ngd.Cu a v b u sai113.Cc kiu rp c bn ca BJT l:

a.CE, CB, CCb.E chung, B chung, C chung

c.D chung, S chung, G chungd.Ch c cu C sai114.Hiu in th gia cc nn v cc pht ca BJT gi l:a.VBCb.VCEc.VBEd.VDS115.Hiu in th gia cc thu v cc pht ca BJT gi l:

a.VBEb.VCEc.VBCd.C ba cu u sai116.Khi BJT dn bo ha ta c:

a.UBE lnb.Dng IC lnc.UBE = 0Vd.Ch c cu c sai117.Khi transistor dn in c dng:

a.IC>IB>IEb.IE>IC>IBc.IE=IB=ICd.C ba cu u ng118.Ta im phn cc Q ca BJT l:

a.IB, IC, VBEb.VGS, ID, VDSc.IC, ID, VCEd.IB, IC, VCE119.Ta im phn cc ca BJT:a.IB tng, IC tng, VCE tngb.IB tng, IC tng, VCE gimc.IB gim, IC gim, VCE gimd.IB gim, IC tngVCE gim120.ng ti tnh trn c tuyn ng ra ca BJT l:a.Qu tch ca im phn cc Qb.ng congc.ng trnd.C ba cu u sai121.Khi transistor lm vic vng khuch i tuyn tnh ta c:

a.

b.

c.

d.

122.Khi BJT dn in th:a.Mi ni P-N gia B v E c phn cc thun

b.Mi ni P-N gia B v C c phn cc nghchc.Cu a v b u ngd.C ba cu u sai123.Mch tng ng dng tham s hydrid ca BJT c:a.hie l tng tr vob.hfe l h s khuch i dngc.hre l tng tr rad.Ch c cu c sai124.JFET l linh kin c ba chn:

a.B, C, Eb.D, S, G

c.A, K, Gd.E, B1, B2125.Ta im phn cc Q ca JFET l:

a.IB, IC, VCEb.IB, IC, VBEc.VGS, ID, VDSd.IA, ID, VDS126.Trn c tuyn chuyn ca JFET knh N ta thy:

a.VGS cng m th ID cng lnb.VGS = 0V th ID = 0Ac.VGS cng m th ID cng nhd.VGS = 0V th ID < 0127.Theo h c tuyn ng ra ca JFET knh N ta c:a.ID t gi tr bo ha cao nht ng vi VGS = 0Vb.ID t gi tr bo ha cao nht ng vi VGS = -1Vc.ID t gi tr bo ha cao nht ng vi VGS = -2V

d.ID gim khi VDS tng128.ng ti tnh trn c tuyn ng ra ca JFET c dng:a.ng trnb.ng congc.ng thngd.C ba cu u sai129.MOSFET loi tng knh N c cu to khc MOSFET loi him knh N:

a.C sn knh Nb.Khng c sn knh Nc.C sn knh Pd.Khng c sn knh P130.MOSFET loi tng knh P c cu to khc MOSFET loi him knh P:

a.C sn knh Pb.Khng c sn knh Pc.Cu a ng, b said.Cu a sai, b ng131.MOSFET loi him knh P c cu to khc MOSFET loi tng knh P:a.C sn knh Pb.Khng c sn knh Pc.C sn knh Nd.Khng c sn knh N

132.MOSFET loi him knh N c cu to khc MOSFET loi tng knh N:

a.Khng c sn knh Nb.C sn knh Nc.Cu a sai, b ngd.Cu a ng, b sai133.Hiu in th gia cc thot v cc ngun ca MOSFET gi l:

a.VGSb.VBEc.VCEd.VDS134.UJT l:

a.Transistor lng nib.Transistor hiu ng trngc.Transistor n nid.Quang transistor135.in tr gia B1 v B2 ca UJT:a.40 1Kb.1K 30K

c.30K 300Kd.300K tr ln136.SCR l mt linh kin c:

a.Vng in tr mb.Vng in p lun mc.c tuyn ging dioded.C ba cu u sai137. lm tt c SCR khi dn, ta phi:

a.Ngt dng IAb.Ch cho VGK = 0c.Ngt dng IGd.C ba cu u sai138.Thyristor l mt linh kin c ba chn:

a.D, S, Gb.B, C, Ec.A, K, Gd.E, B1, B2139.SCR c in p VAK>0 th trong SCR c:a.3 mi ni P-N c phn cc thunb.3 mi ni P-N c phn cc nghchc.1 mi ni P-N c phn cc thun v 2 mi ni P-N c phn cc nghch

d.C ba cu u sai140.SCR c in p VAK Vin+

b. Vin- < Vin+

c. Vin- = Vin+ *

d. Vin-, Vin+ la nhng gia tr tuy y.

121. Cho s o mach hnh 2.5, hay xac nh ien ap tai ngo vao ao:

a. Vin/Rin-Vout/Rf

b. (Vin -Vout)/(Rf+ Rin)

c. -Rf/Rin

d. Xem nh c noi at ao tai ay. *

Hnh 2.5

122. Hay cho biet IC TL081 la loai Op-amp:

a. Kieu Op-amp lng cc.

b. Kieu Op-amp co ngo vao dung FET*

c. Kieu Op-amp co ngo vao dung BJT

d. cau b va c ung

123. Hay cho biet IC 741 (hay HA17741) la loai Op-amp:

a. Kieu Op-amp lng cc.

*

b. Kieu Op-amp co ngo vao dung BiFET

c. Kieu Op-amp co ngo vao dung FET

d. cau b va c ung

124. Bang thong o li n v cua IC TL081 gap may lan bang thong o li n v so vi IC741 (hay HA17741):

a. 2

b. 1

c. 3

*

d. 5

125. Xet Op-amp ly tng va khong co hoi tiep. Hay cho biet tai vi tr bang thong (-3dB) tan so khoang:

a. 1MHz

b. 15Hz

c. 3MHz

d. 5Hz

*

126. Xet Op-amp TL081C va khong co hoi tiep. Hay cho biet tai vi tr bang thong (-3dB) tan so khoang:

a. 1MHz

b. 15Hz*

c. 3MHz

d. 5Hz

127. Mot Op-amp ly tng co bang thong o li n v:

a. 5Hz

b. 1MHz*

c. 3MHz

d. 15Hz

128. Bang thong o li n v cua IC741 khoang:

a. 5Hz

b. 1MHz*

c. 3MHz

d. 15Hz

129. Bang thong o li n v cua IC TL081C khoang:

a. 5Hz

b. 1MHz

c. 3MHz *

d. 15Hz

130. Hay cho biet phat bieu nao la SAI:

a. Hoi tiep la hien tng mot phan tn hieu ngo ra c a ngc ve ngo vao.

b. Co hai loai hoi tiep: hoi tiep dng va hoi tiep am.

c. Hoi tiep dng lam tang bang thong (-3dB).

*

d. Hoi tiep am lam tang bang thong o li.

131. Trong trng hp mach co hoi tiep dng, hay cho biet ket luan nao sau ay la SAI:

a. Lam mach on nh*

b. Lam giam bang thong

c. Lam tang tn hieu ngo ra.

d. Lam tang o meo.

132. Trong trng hp mach co hoi tiep am, hay cho biet ket luan nao sau ay la SAI:

a. Lam mach on nh

b. Lam tang tn hieu ngo ra.*

c. Lam tang bang thong

d. Lam giam o meo.

133. Trong trng hp mach co hoi tiep am, o li mach khuech ai:

a. Luon bang vi o li vong h.

b. T le nghch vi he so hoi tiep

*

c. Phu thuoc vao cac gia tr linh kien ben ngoai.

d. Phu thuoc vao hnh dang tn hieu a vao.

134. Cho mach khuech ai ao nh hnh 3.1, cong thc tnh he so khuech ai la:

a. AvF = Rf/Ri

b. AvF = 1+ Rf/Ri

c. AvF = - Rf/Ri

*

d. AvF = -1

Hnh 3.1

135. Xet mach khuech ai ao nh hnh 3.1, hay cho biet ket luan nao sau ay la SAI:

a. Rf la ientr hoi tiep

b. Ri la ien tr nguon cua Vin

*

c. AvF = - Rf/Ri

d. Tn hieu vao va tn hieu ra ao pha 180 o.


a. He so khuech ai phu thuoc cac linh kien ben ngoai.

b. AvF = - Rf/Ri

c. Rf la ientr hoi tiep.

d. Tn hieu vao va tn hieu ra cung pha.

*


a. He so khuech ai phu thuoc cac linh kien ben ngoai.

b. Tn hieu vao va tn hieu ra ao pha 180 o.

c. Rf la ientr hoi tiep.

d. Tong tr vao Zin = rat ln

*

138. Xet mach khuech ai ao nh hnh 3.2, biet Avf = -15, nguon cap ien 12V. Ngi ta cho ien ap ngo vao 0.5V. Hoi gia tr ien ap ngo ra:

a. -11V

b. +11V

c. -0.75V

d. -7.5V*

Hnh 3.2

139. Xet mach khuech ai ao nh hnh 3.2, biet Avf = -15, nguon cap ien 12V. Ngi ta cho ien ap ngo vao -0.8V. Hoi gia tr ien ap ngo ra:

a. -11V

b. +11V*

c. 8.0V

d. -8.0V

140. Xet mach khuech ai ao nh hnh 3.2, biet tong tr ngo vao la 2000, Avf = -11, nguon cap ien 12V. Hoi gia tr ien tr Rk va Rf:

a. Rk = 2K, Rf= 22K

b. Ri = 1.83K, Rf = 22K

c. Rk = 1.83K , Rf = 22K

*d. Ri = 2K , Rf = 22K

141. Xet mach khuech ai ao nh hnh 3.2, biet tong tr ngo vao la 3000, Avf = -14, nguon cap ien 12V. Hoi gia tr bang thong:

a. 0.067MHz

*b. 0.076MHz

c. 0.67MHz

d. 0.76MHz

142. Xet mach khuech ai ao nh hnh 3.2, biet tong tr ngo vao la 3000, Avf = -10, nguon cap ien 12V. Ngi ta cho tn hieu hnh sin 20mVp-p (nh nh) tan so 1KHz. Hoi dang song ien ap ngo ra la:

a. ao pha 180 o C, bien o 200mVp-p, tan so 10KHz.

b. ao pha 90 o, bien o 200mVp-p, tan so 10KHz.

c. ao pha 90 o, bien o 200mVp-p, tan so 1KHz.

d. ao pha 180 o , bien o 200mVp-p, tan so 1KHz.

*


a. ay la mach khuech ai ao dung Op-amp TL081C.

*

b. ay la mach khuech ai ao dung Op-amp lng cc.

c. Rk = RiRf/(Ri+Rf)

d. Avf= -Rf/Ri

Hnh 3.3


a. ay la mach khuech ai ao dung Op-amp lng cc.

b. Rk = RiRf/(Ri+Rf)

c. Avf= -Rf/Rk

*

d. Avf= -Rf/Ri

145. Xet mach hnh 3.4, hay cho biet ket luan nao sau ay la SAI:

a. ay la mach khuech ai khong ao dung Op-amp BiFET.

b. Vin =Vout

c. Avf = - Rf/Rk

*

d. Avf = 1 + Rf/Ri

Hnh 3.4

146. Xet mach khuech ai khong ao nh hnh 3.4, hay cho biet ket luan nao sau ay la SAI:

a. Rf la ientr hoi tiep

b. Tong tr vao Zin = Ri

*

c. Avf = 1 + Rf/Ri

d. Tn hieu vao va tn hieu ra cung pha.

147. Xet mach khuech ai khong ao nh hnh 3.4, hay cho biet ket luan nao sau ay la SAI:

a. Tong tr vao Zin = rat ln.

b. Tn hieu vao va tn hieu ra cung pha.

c. He so khuech ai phu thuoc cac linh kien ben ngoai.

d. He so khuech ai phu thuoc vao Vin

*

148. Xet mach khuech ai khong ao nh hnh 3.4, biet Avf = 11, Ri = 10K, Rf = 100K nguon cap ien 15V. Ngi ta cho ien ap ngo vao -1.5V. Hoi gia tr ien ap ngo ra:

a. -14V

*

b. +14V

c. +15V

d. -15V

149. Xet mach khuech ai khong ao nh hnh 3.4, biet Avf = 11, Ri = 10K, Rf = 100K nguon cap ien 15V. Ngi ta cho ien ap ngo vao -1.3V. Hoi gia tr ien ap ngo ra:

a. -14V

b. +14V

c. +13V

d. -13V*

150. Xet mach khuech ai khong ao nh hnh 3.4, biet Avf = 11, nguon cap ien 15V. Hoi gia tr ien tr Ri va Rf:

a. Ri = 560, Rf = 5.6K

*

b. Ri = 720, Rf = 5.6K

c. Ri = 560 , Rf = 6.8K

d. Ri = 720 , Rf = 6.8K

151. Xet mach khuech ai khong ao nh hnh 3.4, biet Rf= 2K, Avf = 10, nguon cap ien 15V. Ngi ta cho tn hieu hnh sin 10mVp-p (nh nh) tan so 10KHz. Hoi dang song ien ap ngo ra la:

a. ao pha 180 o, bien o 110mVp-p, tan so 1KHz.

b. Cung pha vi ngo vao, bien o 110mVp-p, tan so 1KHz.

c. Cung pha vi ngo vao, bien o 110mVp-p, tan so 10KHz.*

d. ao pha 180 o, bien o 110mVp-p, tan so 10KHz.

152. Xet mach khuech ai khong ao dung Op-amp TL081C, Avf = 13, nguon cap ien 15V. Hoi gia tr bang thong:

a. 0.067MHz

b. 0.076MHz

*

c. 0.23MHz

d. 0.056MHz

153. cho mach hnh 151.mach K ao dung LM741C co ien tr ngo vao khong ao Rk la :

Hnh 151

a. Ri * Rf / (Ri + Rf )*

b. (Ri + Rf) / Ri * Rf

c. Ri * Rf / (Ri - Rf )

d. (Ri - Rf) / Ri * Rf

154. hnh 151 .Mach K ao dung LM741C co Avf = -25, Zin = 3000 ien tr ngo vao khong ao Rk la :

a. 2885

*

b. 3000

c. 75000

d. 38500

155. Hnh 151. mach K ao dung LM741C co Avf = -25, Zin = 3000 ien tr hoi tiep Rf la :

a. 2885

b. 3000

c. 75000*

d. 38500

156. Hnh 151.mach K ao dung LM741C co Avf = -25, Zin = 3000 ien tr Ri la :

a. 2885

b. 3000 *

c. 75000

d. 38500

157. Hnh 151.mach K ao dung LM741C co Avf = -25, Zin = 3000 . BW la :

a. 2885

b. 3000

c. 75000

d. 38500 *

Hnh 156

158. Hnh 156 .mach K ao dung TL081C co Avf = -25, Zin = 3000 ien tr hoi tiep Rf la :

a. 115000

b. 3000

c. 75000*

d. 38500

159. hnh 156.Mach K ao dung TL081C co Avf = -25, Zin = 3000 . BW la :

a. 115000*

b. 3000

c. 75000

d. 38500

160. BW va Zin cua mach K khong ao tng ng la :

a. BW o li n v / ( Avf +1 ) va Ri

b. BW o li n v / Avf va Ri

c. BW o li n v / ( Avf +1 ) va vo cung

d. BW o li n v / Avf va vo cung

*

161. mach K khong ao dung LM741C co Avf = 25, Ri = 3000 ien tr hoi tiep Rf la :

a. 72000*

b. 3000

c. 75000

d. 38500

162. mach K khong ao dung LM741C co Avf = 25, Ri = 3000 . BW la :

a. 72000

b. 40000 *

c. 75000

d. 38500

163. mach K khong ao dung TL081C co Avf = 40, ien tr hoi tiep Rf = 100K . Ri la :

a. 2400

b. 2560*

c. 75000

d. 38500

164. mach K khong ao dung TL081C co Avf = 40, ien tr hoi tiep Rf = 100K . BW la

a. 2400

b. 2560

c. 75000*

d. 38500

165. mach K em la :

a. mach K khong ao

b. mach K o li n v*

c. mach K theo

d. mach K ao

166. mach K em dung e :

a. bao ve tai

b. K o li n v

c. nang cong suat a en tai

d. ca 3 cau ung*

167. mach K em ao co :

a. Ri = Rf

b. Avf = -1

c. BW = BW n v

d. ca 3 cau ung*

168. Cho mach sau hnh 168.dong ien vao c tnh

Hnh 168

a.Ii =Vin /(R1 + R2)b. Ii =Vin /(R1// R2)

c. Ii =Vin /R1 *d. Ii =Vin /R2

169. Cho mach sau hnh 168.ien ap ra c tnh:

a.vo = -vi*b.vo = 2vi

c. vo = vid. ca ba cau eu sai

170. Cho mach sau hnh 168.Dong ien ra Io c tnh

a. Io =-Vo /(R1 + R2)b. Io =-Vo /(R1// R2)

c. Io =-Vo / R1 d. Io =-Vo / R2*

171. Cho mach sau hnh 168.ien ap tai ngo vao ao c tnh bang

a.V- = Vinb.V- = 0*

c.V- = Ii.R1d.V- = V0172. Cho mach sau hnh 171. cho Vin = 5V, dong ien Ii co gia tr

Hnh 171

a.5mA*b.5A

c.0Ad.-5mA

173. Cho mach sau hnh 171.Cho ien ap vao la 5V, ien ap ra co gia tr:

a.12.5mVb.-2.2V

c.-11V*d.14V


a.2.2mVb.-2.2V*

c.-2.2mVd.2.2V

175. Cho mach sau hnh 171.Cho Vin = 1V, dong ien Ii co gia tr

a.5mAb.5A

c.-1mAd.1mA*


a.22Vb.-22V

c.-14V*d.14V

177. Cho mach sau hnh 171.Cho ien ap vao Vin la song sin,bien o 1V,tan so 1Khz

Dang song ra Vo co dang

a.song sin, bien o 1V, cung pha tn hieu vao

b.song sin, bien o 1V, ngc pha tn hieu vao

c.song sin, bien o 2.2V, cung pha tn hieu vao

d.song sin, bien o 2.2V, ngc pha tn hieu vao*

178. Cho mach sau hnh 171.Cho ien ap vao Vin la song sin,bien o 10V,tan so 1Khz

Dang song ra Vo co dang

a.song sin, bien o 22V, ngc pha tn hieu vao

b.song sin, bien o 22V, cung pha tn hieu vao

c.song sin, ngc pha tn hieu vao,b xen hai au mc Vsat+ va Vsat-*

d.song sin, cung pha tn hieu vao,b xen hai au mc Vsat+ va Vsat-

179. Cho mach sau hnh 176

Hnh 176

Tr tuyet oi he so khuech ai ien ap Av trong khoang

a.T 1.1 en 2.2*b.T 1 en 2

c.T 0 en 2.2

d.T -2.2 en -1.1

180. Cho mach sau hnh 176.Khi chnh bien tr co gia tr tang dan, chon cau SAI

a. tr tuyet oi ien ap ra vo giamb.dong vao Ii tang*

c.dong Io giam

d.Zin tang

181. Cho mach sau hnh 176.Khi chnh bien tr co gia tr giam dan, chon cau SAI

a.Tr tuyet oi ien ap ra vo tangb.dong vao Ii tang

c.dong Io giam*

d.Zin giam

182. Cho mach sau hnh 176.Cho ien ap vao la 2V.Dong ien vao Ii trong khoang

a. T 0A en 2.2A

b. T 0A en 1.1mA

c. T 1mA en 2mA*

d. T 1A en 2A

183. Cho mach sau hnh 176.Cho ien ap vao la 2V.ien ap ra Vo trong khoang:

a. T 0V en 2.2V

b. T 2.2V en 4.4 V

c. T -1.1V en -2.2V

d. T -4.4V en -2.2V*

184. Cho mach sau hnh 176.Cho ien ap vao la -3V.ien ap ra Vo trong khoang:

a. T 0V en 3.3V

b. T 3.3V en 6.6 V*

c. T -6.6V en -3.3V

d. T -6.6V en 6.6V

185. Cho mach sau hnh 176.Cho ien ap vao la 10V.ien ap ra Vo trong khoang:

a. T -14V en -11V*

b. T 11V en 14V

c. T -22V en -11V

d. T 11V en 22V

186. Cho mach sau hnh 176.Cho ien ap vao la -10V.ien ap ra Vo trong khoang:

a. T -14V en -11V

b. T 11V en 14V*

c. T -22V en -11V

d. T 11V en 22V


Hnh 182

He so khuech ai ien ap Av trong khoang

a.T 1 en 5

b.T -6 en -1*

c.T 1 en 6

d.T -5 en 1

188. Cho mach sau hnh 182.Khi chnh bien tr tang dan th

a.dong vao Ii khong oi*b.dong vao Ii tang

c.dong vao Ii giam

d.ca ba cau eu sai

189. Cho mach sau hnh 182.Khi chnh bien tr giam dan th

a.dong vao Ii khong oi*b.dong vao Ii tang

c.dong vao Ii giam

d.ca ba cau eu sai

190. Cho mach sau hnh 182.Khi chnh bien tr giam dan, chon phat bieu SAI

a.tr tuyet oi ap ra giam danb.dong Ii khong oi

c.dong Io khong oi

d.tong tr vao Zin tang*

191. Cho mach sau hnh 182.Khi chnh bien tr tang dan, chon phat bieu SAI

a.tr tuyet oi ap ra tang danb.dong Ii khong oi

c.dong Io khong giam dan*d.tong tr vao Zin khong oi

192. Cho mach sau hnh 182.Cho ien ap vao la 2V, chnh VR ien ap ra trong khoang

a.T 1V en 6V

b.T -12V en 2V

c.T -12V en -2V*

d.T 2V en 12V

193. Cho mach sau hnh 182.Cho ien ap vao la -1V, chnh VR, ien ap ra trong khoang

a.T 1V en 6V*

b.T -12V en 2V

c.T -12V en -2V

d.T -1V en -6V

194. Cho mach sau hnh 182.Cho ien ap vao la 6V, chnh VR ien ap ra trong khoang

a.T 6V en 14V

b.T 6V en 36V

c.T -36V en -6V

d.T -14V en -6V*

195. Cho mach sau hnh 182.Cho ien ap vao la -5V, chnh VR, ien ap ra trong khoang

a.T 5V en 30V

b.T -14V en -5V

c.T 5V en 14V*

d.T -30V en -5V


Hnh 187Gii thieu ien t1.Vat lieu ban dan thng c dung nhieu nhat la :

a. Bac

b. ong

c. Silic .*

d. Thiec

2.Trung tam cua nguyen t c goi la :

a.Ntron

b.Hat nhan .*

c.ien t

d. Hoa tr.

3.Phan phu nguyen t vi khoi lng nho nhat la :

a. ien t .*

b. Proton

c. Ntron

d. Hat nhan

4.Tong so hat ien t cha trong lp th 3 khong vt qua :

a.2

b.8

c.18 .*

d.28

5.Cac ien t lp ngoai cung c xem nh la cac ien t ____

a. Chnh

b. Phu

c. C ban

d. Hoa tr .*

6.Tnh chat co hng cua ien nang c goi la :

a. Cc tnh .*

b. ien ap

c. Nguon

d. Newton

7.Tnh ien la :

a.Dong quy c

b. Nap tnh ( khong di chuyen ).*

c. Dong cac electron

d.Dong cac proton

8. Mot nguyen t khong can bang hay c nap goi la :

a. Ion .*

b. Tr

c. Ntron

d. Hoa tr

9. Chat dan dong ien rat t c biet nh la :

a. Cach ien .*

b. Dan ien

c. Kim loai

d. Cuon day

10. Bien o cua cng o dong ien c o bi :

a. Volt

b. Watt

c. Ampe .*

d. Ohm

11.T so cua 1 joule tren 1 coulomb c goi la :

a. Volt .*

b. Watt

c. Ampe

d. Ohm

Dong ien DC

12. Mot day c thay the bi day dai gap oi va ng knh mot na. ien tr la :

a. 1 / 4

b. 4 lan

c. 8 lan .*

d. Nh nhau

13. Tat ca dong ma i ra khoi mot iem trong mach phai bang vi :

a. ien ap quanh mach

b. ien tr cua mach

c. Tong cac dong t nguon

d. Dong i vao nut o .*

14. oi vi dong ien trong mach tang. ien ap phai_____ va /hay ien tr phai ____.

a. Tang, giam .*

b. Giam , tang

c. Tang , tang

d. Giam, giam.

15. Tnh chat co hng cua ien c goi la : ____.

a. Dong*

b. Bien o

c. Pha

d. Cc tnh .

16. Mot mach ma dong co mot chieu c goi la _____.

a. DC .*

b. AC

c. AM

d. FM

17.Cach nang lng c dung nhanh nhat la o _____.

a. Tr khang

b. Nguon .*

c. Cong viec

d. The

18. n v c ban cua nang lng ien la :

a.Volt

b.Ampe

c. Ohm

d. Watt .*

19.ong c ien DC lam viec 220 volts va 660 watts se tao dong ien la :

a. 1 amp

b. 2 amp

c. 3 amp .*

d. 4 amp

20.Mach noi tiep la mach trong o dong la

a. Tch cua cong suat va ien ap.

b. Tong cua ien tr chia cho ien ap

c. Tong cua cac ien tr chia bi ien ap

d. Giong trong moi phan .*

21. Mach noi tiep co 4 ien tr 100 Ohm. ien tr tng ng la :

a. 400 Ohm .*

b. 200 Ohm

c. 50 Ohm

d. 25 Ohm

22. Mach song song co 4 ien tr 100 Ohm . ien tr tng tng la :

a. 400 Ohm .

b. 200 Ohm

c. 50 Ohm

d. 25 Ohm .*

23. Mach RC co gia tr R=200 k( va C=8 (F co thi hang la :

a. 0,4 sec (giay)

b. 1,6 sec .*

c. 4 sec

d. 16 sec

ien AC

24. Dang song tren man hnh may hien song thay oi dng va am quanh mot truc la :

a. ien ap DC

b. ien ap AC .*

c. Ap khong oi

d. Dang pha

25. Gia tr trung bnh cua mot chu ky ay u cua song sin th bang :

a. 0,707 lan gia tr nh

b. 0,637 lan gia tr nh .*

c. 2 lan gia tr nh

d. 0

26. Hau het may o AC volt va o AC Ampe c anh mau e oc :

a. Gia tr RMS hieu dung cua song sin .*

b. Gia tr trung bnh cua song sin

c. 2 lan gia tr dc

d. 1 / 2 gia tr DC

27.Tr khang cua mot mach la ____ hoac ien tr hay tong tr mot mnh.

a.Ln hn .*

b. Bang vi

c. Nho hn

d. 2 lan

28. Mot thiet b chuyen nang lng ien t mc dong-ap nay sang mc dong ap khac c goi la :

a. Transistor

b. Tu ien

c. Diode

d. Bien the .*

Diode va Transistor BJT

29. Diode dan ien khi no :

a. c pha vi nhom

b. Phan cc ngc.c. Phan cc thuan .*d. Nap ien am

30. Cang them nhieu phot pho vao silicon th :

a. ien tr cang thap .*

b. Lo trong c tao ra cang nhieu.

c. No tr nen tr hn

d. No tr nen suy yeu hn

31. Bm Silicon vi Aluminum tao ra hat mang ien t do goi la :

a. Proton

b. ien t

c. Ntron

d. Lo trong . *

32.Lp Si mong ca hai pha moi noi ma khong co hat dan nao goi la :

a. Vung suy yeu , ngheo. *

b. Vung toi

c. Vung tr

d. Vung ay

33.Ngng ien ap cua diode moi noi PN Si la xap x :

a. 0,2 volt

b. 0,4 volt

c. 0,7 volt .*

d. 1,4 volt

34.Ban dan loai P cua Diode c goi la :

a. Catot

b. Anode *

c. Nen

d. Phat

35.Mot nguyen t s dung ien t lp ngoai cung e :

a. On nh hoa hat nhan

b. Huy khoi lng proton

c. Tao s lien ket .*

d. Phat sang

36.Ban dan thuan khiet hay vat lieu ban dan khac la :

a. Chat cach ien .*

b. Chat dan ien

c. Diode

d. Transistor

37. Trong Transistor NPN, vung P la :

a. Catot

b. Cc phat

c. Cc nen .*

d. Cc thu

38.Khi transistor m tat ca cac ng, th no trong ieu kien ___.

a. Bu

b. Bao hoa .*

c. Thuan

d. Nghch

UJT, FET

39.ieu kien dan cua UJT :

a.* b.

40. ieu kien dan cua JFET kenh N: a. * b.

41.FET co u iem hn BJT la :

a. Tong tr vao ln .*

b. Tong tr ra ln.

c. Tong tr vao nho

d. Tong tr ra nho.

42. Mach dao ong tch thoat tao ra xung :

a. Rang ca .*

b. Sin

c. Vuong

d. Cau a va c ung

Khuech ai va Khuech ai cong suat

43.Mach cua hau het he thong ien t nh la TV gom co hau het :

a. Bo ieu che

b. Bo dao ong

c. Khuech ai .*

d. Chnh lu

44. Mach khuech ai tn hieu ien ap trong mot bc c goi la :_______ khuech ai ap.

a. Cau

b. Tang .*

c. ng dan

d. Mang

45. Trong khuech ai transistor, ien tr c noi t cc nen vi Vcc c goi la ien tr _____ :

a. Phan cc .*

b. Tai

c. Hoi tiep

d. On nh hoa

46. Neu ien ap vao bo khuech ai la 0.05 volt va bo khuech ai tao ra ien ap ra la 2 volt, khi o he so khuech ai ap la :

a. 40 .*

b.120

c.200

d. 400

47. Ch co mot na chu ky cua song tn hieu vao c khuech ai hoat ong lp ___.

a. A

b. B .*

c. C

d. D

48. ien tr emitter gay ra hoi tiep _______.

a. Hai

b. Cam

c. Hoi tiep dng

d. Hoi tiep am .*

Bo khuech ai thuat toan (Op-amp)

49.Bo khuech ai thuat toan la :

a. La mach K mot chieu ly tng co ngo vao oi xng, ngo ra 1

b. La mot mach KVS ac biet.

c. Co ien ap ngo ra VL=AV. Vid = AV.(V+ - V-)

d. Tat ca eu ung.*

50. Ky hieu cua bo khuech ai thuat toan la :

a) +Vcc * b) E1 S1

V- VL

V+ + E2 + S2

-Vcc

V+ : ien ap ngo vao khong ao V- : ien ap ngo vao ao

VL : ien ap ngo ra AV : o li, he so khuech ai ap

51. Cac tnh chat ly tng cua mot mach khuech ai la :

a. A= ( b. Zi= ( c. Zo = 0 d. Tat ca eu ung*

52. Cau truc Op-amp gom co :

a. 2 tang : KVS va KCS b. 3 tang : KVS, K ap Av >>1 va KCS*

c. 1 tang : KVS d. Tat ca eu sai

53. ien ap lech khong vao (input offset voltage) la :

a. VOS= | IB+ - IB- | *b.ien ap DC a vao ngo vao e ien ap ngo ra bang 0

c. ien ap ngo ra VO ( 0 d.Tat ca eu sai

54. Trong mach khuech ai ao dau , AV :

a. Khong phu thuoc thong so cua Op-amp

b. Phu thuoc thong so cua Op-amp

c. Phu thuoc vao cac phan t mach hoi tiep (ien tr)

d. Cau a va c eu ung.*

55. Bo khuech ai khong ao dau tn hieu co AV :

a. AV= 1 + R2/R1 * b.AV= -R2/R1

c. AV= R1/R2 d. R1

R1 + R2

56. Tong tr vao cua mach khuech ai khong ao :

a. Zi= Rid. AOL/AV b.Ln hn tong tr vao cua mach ao

c. Nho hn tong tr vao cua mach ao d.Cau a va b ung *

57. Mach khuech ai cong co :

a. VL = -(Rf.V1 + Rf.V2) b. VL= -(V1 + V2) Khi Rf = R1 = R2

R1 R2

c.VL= -Rf.(V1 + V2) Khi R1 = R2 d. Tat ca eu ung.*

R1Mach logic so58. Mach n gian nhat trong may tnh hay he thong so khac c goi la :

a. Bo khuech ai.

b. Cong logic.

c. Chnh lu

d. Bo cong.*

59. Mach thc hien chc nang NOT c goi la :

a.Chuyen oi.

b. Mach lat.

c. Cong OR.

d. Ngch ao (inverter).*

60. Ngo ra cua cong ________ la 1 ch neu tat ca ngo vao la 1.

a.NOT

b. NOR

c. OR

d. AND.*

61.Neu tat ca ngo vao la 0, th ngo ra la 0 oi vi cong _______.

a.OR.*

b.NOR

c.AND

d.cau b va c

62. Cong AND c theo sau bo ao se lam viec nh la :

a.Cong NAND.*

b.Cong NOR

c.Bo ao am

d.Cong AND loai tr (exclusive AND)

LINH KIEN IEN T

1./ Mot nguyen t trung hoa ien khi nguyen t co:

a. so lng proton ln hn so lng electron.

b. So lng proton nho hn so lng electron.

c. So lng proton bang tong so lng electron va Neutron.

d. So lng proton bang so lng electron.*

2./ Mot nguyen t khi khong can bang ien th tr thanh :

a. ion am khi so lng proton ln hn so lng electron.

b. Ion am khi so lng proton nho hn so lng electron.*

c. Ion dng khi so lng electron ln hn so lng proton.

d. Ion am khi so lng electron nho hn so lng proton.

3./ Mot nguyen t khi khong can bang ien th tr thanh :

a. Ion dng khi so lng proton nho hn so lng electron.

b. Ion am khi so lng proton ln hn so lng electron.

c. Ion dng khi so lng electron nho hn so lng proton.*

d. Ion dng khi so lng electron ln hn so lng proton.

4./ Cac hat mang ien tng tac nhau:

a. Cac hat trai dau ay nhau , cac hat cung dau hut nhau.

b. Cac hat cung dau hut nhau, cac hat trai dau hut nhau.

c. Cac hat trai dau hut nhau, cac hat cung dau ay nhau.*

d. Cac hat cung dau ay nhau , cac hat trai ay nhau.

5./ Electron la hat :

a. khong mang ien tch .

b. Mang ien tch am.*

c. Mang ien tch dng.

d. Ban dan.

6./ Proton la hat:

a. Ban dan .

b. Khong mang ien tch.

c. Mang ien tch am.

d. Mang ien tch dng.*

7./ Hieu ien the gia hai au oan mach la AB:a. UAB = VB -VA = - UBAb. UAB = VB + VA = UBAc. UAB = VA - VB = UBAd. UAB = VA - VB = - UBA*8./ o ln lc tng tac gia hai ien tch iem q1, q2 trang thai ng yen , cach nhau mot khoang :

a. T le thuan vi tch q1q2 va t le nghch vi .*

b. T le thuan vi tch q1q2 va t le thuan vi .

c. T le nghch vi tch q1q2 va t le nghch vi .

d. T le nghch vi tch q1q2 va t le thuan vi .

9./ Neu ap vao hai au tu mot hieu ien the xoay chieu th dong xoay chieu :

a. = I0. sin

EMBED Equation.3 b. = I0. sin(+)

c. = I0. sin(+)*

d. = I0. sin(-)

10./ Neu ap vao hai au cuon cam mot hieu en the xoay chieu =U0sin

a. = I0. sin

b. = I0. Sin(-)*

c. = I0. Sin(+)

d. = I0. Sin(+)

11./ ien tr day dan :

a. T le thuan vi tiet dien day dan .

b. T le nghch vi tiet dien day dan .*

c. Khong phu thuoc vao tet dien cua day dan .

d. Bang tiet dien cua day dan.

12./ oan day co o dan 20s, ien tr se la:

a. 20

b. 0,02

c. 0,05 *

d. 0,5

13./ bieu thc cua nh luat Ohm cho oan mach la:

a. U=I.R

b. R=

c. I=*

d. U=

14./ Nhiet tr la ien tr co tr so :

a. luon luon tang theo nhiet o .

b. Luon luon giam theo nhiet o.

c. Khong thay oi khi nhiet o thay oi.

d. Thay oi khi nhiet o thay oi.*

15./ Nhiet tr am NTC ( Negative Temperature Coefficient) la nhiet tr co tr so ien tr:

a. Khong oi khi nhiet o thay oi .

b. Giam khi nhiet o giam .

c. Tang khi nhiet o tang .

d. Tang khi nhiet o giam.*

16./ Nhiet tr dng PTC ( Positive Temperature C oefficient)

a. giam khi nhiet o tang .

b. Tang khi nhiet o giam.

c. Tang khi nhiet o tang.*

d. Khong oi khi nhiet o thay oi.

17./ en tr tng ng cua hai ien tr R1, R2 ghep noi tiepla:

a. R1+ R2.*b.

c. +

d.

18./ en tr tng ng cua hai ien tr R1, R2 ghep song song la:

a. R1+ R2.b. +

c.

d. *

19./ ien tr R= 2200 ; R=0,01 K ghep noi tiep .ien tr tng ng cua chung:

a. 2300

b. 22,01 K

c. 2,21*

d. 9,95

20./ ien tr tng ng cua ba ien tr mac song song vi R1=R2=R3=10K la:

a. 30K

b. 330

c. 0,33K

d. 3300*

21./ ien tr tng ng cua hai ien tr mac song song vi R1=R2=0,5K:

a. 1 K

b. 4K

c. 0,4K

d. 0,25K*

22./ Vi ien tr 3 vong mau th vong th 3 ch:

a. so tng ng vi mau.

b. Sai so

c. So so 0 them vao*

d. Nhiet o.

23./ Vi ien tr 4 vong mau th vong th t ch:

a. Sai so *

b. So tng ng vi mau

c. So so 0 them vao

d. ien ap chu ng c.

24./ Vi ien tr 5 vong mau th vong th hai ch:

a. Sai so

b. So so 0 them vao

c. So tng ng vi mau*

d. Nhiet o.

25./ Vi ien tr 5 vong mau th vong th t ch:

a. So tng ng vi mau.

b. So so 0 them vao.*

c. Sai so

d. ien ap chu ng c.

26./ Vi ien tr 5 vong mau th vong th ba ch:

a. So so 0 them vao.

b. Sai so

c. So tng ng vi mau*

d. Nhiet o.

27./ ien tr 3 vong mau : o- o- o. Gia tr en tr la:

a. 222

b. 220

c. 22 K

d. 2,2 K*

28./ ien tr 4 vong mau : A.B.C.D la luc lam- cam-vang kim. Gia tr en tr la:

a. 5,6 K

b. 560 K

c. 56 K*

d. 560

29./ ien tr co 4 vong mau A-B-C-D la cam- cam- cam- bac. Gia tr ien tr la:

a. 330

b. 3,3 K

c. 330 K

d. 33 K*

30./ Vi ien tr 4 vong mau th vong th ba ch :

a. Nhiet o

b. So so 0 them vao *

c. Sai so

d. So tng ng vi mau.

31./ Vi ien tr 5 vong mau th vong th nam ch :

a. So so 0 them vao

b. So tng ng vi mau

c. Sai so*

d. Nhiet o

32./ Khi gia tr cua1 ien tr tang en th:

a. ien tr con tot.

b. ien tr b t.*

c. ien tr b noi tat.

d. Dong qua ien tr ln nhat.

33./ Mot oan mach ien co 2 ien tr R va R ghep song song:

a. Neu R

EMBED Equation.3 R th I

EMBED Equation.3 I( I,I la dong qua R,R) .

b. Neu R


EMBED Equation.3 I*

c. Neu R

EMBED Equation.3 R th U

EMBED Equation.3 U( U,U la hieu ien the gia 2 au R va R)

d. Neu R


EMBED Equation.3 U

34./ Mot oan mach ien co 2 ien tr R va R ghep noi tiep:

a. Neu R


EMBED Equation.3 I ( I,I la dong qua R,R)

b. Neu R


EMBED Equation.3 I

c. Neu R


EMBED Equation.3 U( U,U la hieu ien the gia 2 au R va R).*

d. Neu R


EMBED Equation.3 U

35./ Neu R

EMBED Equation.3 R th ien tr tng ng cua hai ien tr R ghep song song vi R la:

a. Bang R

b. Bang R

c. Gan bang R

d. Gan bang R*

36./ Tu ien la 1 linh kien:

a. Tch cc

b. Thu ong *

c. Ban dan

d. Co vung ien tr am.

37./ ien dung cua tu ien la:

a. ai lng ac trhg cho kha nang tch ien cua tu*

b. ai lng ac trhg cho kha nang can tr dong xoay chieu cua tu

c. ai lng dung e biet ien the lam viec cua tu .

d. ai lng khong phu thuoc vao chat ien moi cua tu .

38./ ien dung cua tu co n v :

a.

b. H

c. F*

d. V

39./ Trong qua trnh nap ien , tu ien co hieu ien the gia hai au tu:

a. Luc au tang sau o giam

b. Luc au giam sau o tang .

c. Giam dan theo ham so mu

d. Tang dan theo ham so mu*

40./ Trong qua trnh xa ien th hieu ien the gia hai au tu:

a. Khong oi

b. Giam dan *

c. Tang dan

d. Bang khong

41./ ien dung tng ng cua 2 tu C,C mac song song la:

a.

b. +*

c.

d.

42./ ien dung tng ng cua 2 tu C,C mac noi tiep:

a. *

b.

c. +

d.

43./ ai lng ac trng cho kha nang can tr dong xoay chieu cua tu ien c goi la:

a. Cam khang

b. Dung khang *

c. ien tr thuan

d. Tong tr

44./ n v cua dung khang la:

a. F*

b.

c. H

d. mA

45./ Dung khang la ai lng :

a. Khong phu thuoc ien dung cua tu

b. Bang ien dung cua tu

c. T le thuan vi ien dung cua tu

d. T le nghch vi ien dung cua tu*

46./ Cho 2 tu giong nhau ghep noi tiep . Sc can tn hieu xoay chieu cua mach ghep noi tiep so vi sc can tn hieu xoay chieu cua moi tu la:

a. Ln hn *

b. Nho hn

c. Bang nhau

d. Bang lan.

47./ Cho 2 tu giong nhau ghep song song . Sc can tn hieu xoay chieu cua mach ghep song song so vi sc can tn hieu xoay chieu cua moi tu la:

a. Bang 2 lan

b. Bang nhau

c. Ln hn

d. Nho hn*

48./ Tu ceramic la loai tu :

a. Co phan cc tnh

b. Khong phan cc tnh*

c. Co tr so luon thay oi

d. Co chat ien moi la mica

49./ Tren than tu ceramic co ghi .01 th gia tr ien dung cua tu la:

a. 0,1uF

b. 0,01 uF*

c. 0,01 pF

d. 0,01F

50./ Tren than 1 tu ien co ghi 222 th tr so ien dung cua tu la:

a. 222F

b. 222pF

c. 2200uF

d. 2200pF*

51./ ien dung tng ng cua 2 tu mac noi tiep vi = 1000pF:

a. 500000 nF

b. 2000000nF

c. 2nF

d. 0,5nF*

52./ ien dung tng ng cua 2 tu mac song song vi = 0,01uF:

a. 20pF

b. 20nF*

c. 0,02pF

d. 0,005uF

53./ Tu hoa la loai tu :

a. Co phan cc tnh.*

b. Khong phan cc tnh.

c. Co chat ien moi la mica.

d. Co chat ien moi la khong kh.

54./ n v cua he so t cam la:

a. F

b. m

c. Ohm

d. H*

55./ ai lng ac trng cho kha nang can tr dong xoay chieu cua cuon cam c goi la:

a. Cam khang.*

b. Dung khang.

c. He so t cam.

d. ien tr thuan.

56./ Cam khang la ai lng:

a. T le nghch vi he so t cam.

b. T le thuan vi he so t cam.*

c. Bang he so t cam.

d. Khong phu thuoc vao he so t cam.

57./ May bien the la may:

a. Ch lam tang the.

b. Ch lam giam the.

c. Lam ien the khong oi.

d. Lam thay oi ien the.*

58./ May tang the la may co vong day cuon th cap:

a. Ln hn so vong day cuon s cap.*

b. Nho hn so vong day cuon s cap.

c. Bang 0,5 lan so vong day cuon s cap.

d. Bang so vong day cuon s cap.

59./ ien ap lay ra cuon th cap cua bien the:

a. Bang so vong day cuon th cap.

b. Khong phu thuoc so vong day cuon th cap.

c. T le thuan vi so vong day cuon th cap.*

d. T le nghch vi so vong day cuon th cap.

60./ Dong ien chay tren cuon th cap cua may biep ap:

a. T le thuan vi so vong day cuon th cap.

b. T le nghch vi so vong day cuon th cap.

c. T le nghch vi so vong day cuon s cap.

d. Khong phu thuoc vao so vong day cua cuon s cap va th cap.*

61./ Si la chat:

a. Ban dan.*

b. Dan ien.

c. Cach ien.

d. ien moi.

62./ Ge la chat:

a. Dan ien.

b. Cach ien.

c. Ban dan.*

d. ien moi.

63./ Khi pha them mot t photpho vao chat ban dan tinh khiet ta c:

a. Chat ban dan loai P.

b. Chat ban dan loai N.*

c. Chat ban dan tinh khiet.

d. Chat ban dan thuan.

64./ Khi pha them mot t Al vao tinh the ban dan tinh khiet ta c:

a. Chat ban dan loai P.*

b. Chat ban dan loai N.

c. Chat ban dan tinh khiet.

d. Chat ban dan thuan.

65./ Chat ban dan thuan (tinh khiet) la:

a. Chat ban dan co so electron nhieu hn so lo trong.

b. Chat ban dan co so electron t hn so lo trong.

c. Chat ban dan co so electron bang so lo trong.

d. Chat ban dan co so electron t do bang so lo trong.*

66./ Chat ban dan loai P la:

a. Chat ban dan co so electron t do nhieu hn so lo trong.

b. Chat ban dan co so electron t do t hn so lo trong.*

c. Chat ban dan co so electron t do bang so lo trong.

d. Chat ban dan co so electron t hn so lo trong.

67./ Chat ban dan loai N la:

a. Chat ban dan co so electron t do nhieu hn so lo trong.*

b. Chat ban dan co so electron nhieu hn so lo trong.

c. Chat ban dan co so electron t do t hn so lo trong.

d. Chat ban dan co so electron bang so lo trong.

68./ Chat ban dan co so electron t do bang so lo trong goi la:

a. Chat ban dan thuan (tinh khiet).*

b. Chat ban dan loai P.

c. Chat ban dan loai N.

d. Khong xac nh c.

69./ Chat ban dan co so electron t do nhieu hn so lo trong goi la:

a. Chat ban dan thuan (tinh khiet).


c. Chat ban dan loai N.*

d. Khong xac nh c.

70./ Chat ban dan co so electron t do t hn so lo trong goi la:

a. Chat ban dan thuan (tinh khiet).

b. Chat ban dan loai P. *


d. Khong xac nh c.

71./ Chat ban dan co so electron bang so lo trong goi la:

a. Chat ban dan thuan (tinh khiet).*



d. Khong xac nh c.

72./ Diode ban dan co cau tao gom:

a. Mot moi noi P-N.*

b. Hai moi noi P-N.

c. Ba moi noi P-N.

d. Bon moi noi P-N.

73./ Khi phan cc thuan diode th:

a. VA < VK.

b. VA > VK.*

c. VA ( VK.

d. VA = VK.

74./ Khi phan cc nghch diode th:

a. VA ( VK.

b. VA > VK.

c. VA < VK.*d. VA = VK.

75./ Diode ban dan co ien the VA < VK th diode c:

a. Phan cc thuan.

b. Phan cc nghch.*

c. Khong phan cc.

d. Noi tat.

76./ Diode ban dan co ien the VA > VK th diode c:

a. Phan cc thuan.*

b. Phan cc nghch.

c. Khong phan cc.

d. H mach.

77./ Diode varicap la diode:

a. Bien dung.*

b. Zener.

c. Photo diode.

d. LED.

78./ Diode zener dung e on ap ta phai:

a. Phan cc thuan.

b. Phan cc nghch.*

c. Khong phan cc.

d. Luon co VAK = 0,6v

79./ Diode co ien tr thuan bang ien tr nghch va bang khong ohm th:

a. Diode tot.

b. Diode co dong nho nhat.

c. Diode b noi tat.*

d. Diode b dt.

80./ Diode co ien tr thuan bang ien tr nghch va bang vo cung ohm th:

a. Diode tot.

b. Diode co dong nho nhat.

c. Diode b noi tat.

d. Diode b t.*

81./ Mach chnh lu ban ky vi ien AC co tan so 50Hz th tan so dn song ngo ra la:

a. 50 Hz.*

b. 25 Hz.

c. 75 Hz.

d. 100 Hz.

82./ Mach chnh lu toan ky vi ien AC co tan so 50Hz th tan so dn song ngo ra la:

a. 50 Hz.

b. 25 Hz.

c. 75 Hz.

d. 100 Hz.*

83./ Diode Zener dung e:

a. Phat quang.

b. Cam quang.

c. On ap.*

d. Tach song.

84./ Khi phan cc nghch diode co dong ien r chay theo chieu:

a. T A ve K va co gia tr rat ln.

b. T A ve K va co gia tr rat nho.

c. T K ve A va co gia tr rat ln.

d. T K ve A va co gia tr rat nho.*

85./ Mach chnh lu cau dung:

a. Mot diode.

b. Hai diode.

c. Ba diode.

d. Bon diode.*

86./ BJT co cau tao gom:

a. Mot moi noi P-N.

b. Hai moi noi P-N.*

c. Ba moi noi P-N.

d. Bon moi noi P-N.

87./ Khi BJT loai PNP dan, a so electron se o:

a. T C en E*

b. T E en C

c. Cung chieu vi

d. Cung chieu vi

88./ Khi transistor NPN dan , a so electron se o:

a. T C en E

b. T E en C*

c. Cung chieu vi

d. Cung chieu vi

89./ ieu kien e transistor NPN dan la:

a.

b. *

c.

d.

90./ Khi transistor dan ien co dong:

a.

b.

c. *

d.

91./ Toa o iem phan cc cua BJT la:

a.

b.

c.

d. *

92./ Toa o iem phan cc cua BJT la:

a. tang , tang , giam .*

b. tang , tang , tang.

c. giam , giam , giam .

d. giam , tang , giam

93./ Khi BJT co =0,8V th BJT:

a. Ngng dan

b. Hoat ong trong vung khuech ai tuyen tnh.

c. Dan bao hoa.*

d. Co dong

94./ Khi BJT lam viec vung khuech ai tuyen tnh ta co:

a.

b.

c. *

d.

95./ Hieu ien the gia cc thu va cc phat cua BJT goi la:

a.

b. *

c.

d.

96./ Hieu ien the gia cc nen va cc phat cua BJT goi la:

a.

b.

c. *

d.

97./ JFET la linh kien co 3 chan:

a. B,C,E

b. D,S,G*

c. A,K,G

d. E,B1,B2.98./ UJT la :

a. Transistor lng noi

b. Transistor hieu ng trng

c. Transistor n noi*

d. Quang Transistor

99./ UJT la 1 linh kien co 3 chan:

a. B,C,E

b. D,S,G

c. A,K,G

d. E,B1,B2*100./ Diode trong UJT co nen N th cc E tng ng la:

a. Cc K

b. Cc A*

c. Cc B

d. Cc C

101./ Diode trong UJT co may tiep giap:

a. 1 tiep giap*

b. 2 tiep giap

c. 3 tiep giap

d. 4 tiep giap

102./ SCR la 1 linh kien co:

a. 1 moi noi P_N

b. 2 moi noi P_N

c. 3 moi noi P_N

d. 4 moi noi P_N*

103./ SCR la 1 linh kien co:

a. vung ien tr am*

b. Vung ien ap luon am

c. ac tuyen giong ac tuyen diode zener

d. ac tuyen giong ac tuyen ngo vao cua BJT

104./ e lam tat c SCR khi a dan , ta phai:

a. Ngat dong IA*b. Ch cho VGK=0

c. Ngat dong IGd. Ch cho VG=0v

105./ DIAC la 1 linh kien :

a. Ch dan ien theo 1 chieu.

b. Dan ien ca 2 chieu*

c. Khong dan ien

d. Luon luon dan ien

106./ Thyristor la linh kien co 3 chan:

a. D,S,G

b. B,C,E

c. A,K,G*

d. E,B1,B2107./ TRIAC la 1 linh kien:

a. Thu ong

b. Co vung ien tr am*

c. Quang ien t

d. Ch dan ien vi nguon AC

108./ Diode cam quang la diode:

a. Phat sang

b. Cam nhan anh sang*

c. Varicap

d. Zener

109./ Quang transistor la linh kien :

a. Phat ra anh sang

b. Cam nhan anh sang*

c. Co vung ien tr am

d. Co dong ra nho hn dong diode cam quang khi at cung moi trng.

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