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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
Answered by
1
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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