8/3/2019 Dien Tich Dien Truong

1/2

Kha hc Chuyn in hc 11 Bi 4. in tch v in trng

Hocmai.vn Ngi trng chung ca hc tr Vit Tng i t vn: 1900 58-58-12 - Trang | 1 -

BI 4. IN TCH V IN TRNG

Bi 1

Trn mt phng nhn nm ngang, t 2 in tch q1 v q2 ti 2 v tr A, B. C 1 24 ,q e q e= = . Tm v tr tin tch qo sao cho khi t qo vo im cn tm th h thng 3 in tch cn bng.

Bi 2. Cho 2 in tch +q v q. t c nh ti 2 im A, B v cch nhau mt khong l d (q > 0). Xc nh vct cng in trng ti im M nm trn trung trc AB cch AB mt khong x. Tm gi tr gii hn ti im khi x .

Bi 3. Cho 2 im A, B nm trn cng mt ng sc in ca in trng gy bi in tch Q bit EA, EB. Tmcng in trng ti im M l trung im ca AB.

Bi 4. Cho 2 bn kim loi phng tch in tri du c ln l Q. in dung ca t in l C, khong cch gia

2 bn l d, chiu di mi bn l l. Ngi ta bn 1 electron c in tch ln e , khi lng m vo trong in

trng trn l O cch bn (+) l d1 vi vn tc vo.

-

+

O h

d1

l

Bv

ov

Q2Q2

B

Q1

A

Mx

+q -q

d

B

A

A M B

Q

BN QUYN THUC V

WWW.EDUCATIONPVA.TK

8/3/2019 Dien Tich Dien Truong

2/2

Kha hc Chuyn in hc 11 Bi 4. in tch v in trng

Hocmai.vn Ngi trng chung ca hc tr Vit Tng i t vn: 1900 58-58-12 - Trang | 2 -

1. Gi s khi bay trong in trng gia 2 bn e khng ri vo bn dng.a. Vit phng trnh chuyn ng ca electron trong in trng.b. Vit phng trnh qu oc. Tm lch cuae electron trong in trngd. Tm vc t vn tc khi bay ra khi in trng2. Tm iu kin ca vo electron khng b ri vo bn dng ca t. B qua tc dng ca trng lc so vi lc

in.

Ngun: Hocmai.vn