Question

fast plz.


hurry up
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Answer 1

power =v^2/r

here r is constant

in first case

100=220*220/r

r=22*22

in second case

pwer =110*110/22*22

         =100/4

         =25w

Answer 2

Bulb is rated 220V and 100W

P=VI

100=220×I

I=10/22

I=5/11

According to the condition

V=110V

P=VI

P=110×5/11

P=10×5

P=50W

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