An electric bulb is rated 220 V and 100 W. When it
is opereted on 110 V. the power consuned will be:
a) 100 W b) 75 W C) 50 W d) 25 W
Answers
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25w answer is correct .........
Answered by
0
Answer:
ANS : 25 WATTS
Step-by-step explanation:
V1 = 220v
P1 = 100w
P = V2/R
Power = ( V the whole power 2) /Resistance
R = V2/P
= 220 × 220/100
= 484ohm
P2 = V2/R
= 110 × 110/ 484
= 25 watts !!
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