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Bn c 110v-440w ni tip vi mt bin tr v t vo mt hiu in th 220v
CU HI N TP VT L
BI 1. Bn c 110V-440W ni tip vi mt bin tr v t vo mt hiu in th 220V.
1. Tnh in tr ca bn l, tnh cng dng in nh mc ca bn l.
2. Tnh in tr cua bin tr n sng bnh thng.
3. Tnh in nng tiu th cu bn l trong mt thng mi ngy dng 1h .
BI 2. Hai bng n c ghi 6V-3W , 12V 6W dy tc bng n cng lm bng vonfram v c cng chiu di l cho tit din cua dy 2 l . Tnh tit din dy 1.
BI 3. Pht biu quy tc bn tay tri v p dng vo bi tp
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