An electric bulb is made of tungsten filament of resistance RΩ. It is marked 100W and 230V. Then, the value of R is :
739Ω
300Ω
100Ω
529Ω
A
300Ω
B
529Ω
C
739Ω
D
100Ω
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Solution
Verified by Toppr
Power P=Vi=V2R
R=V2P=(230)2100=529Ω
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