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A light bulb is rated 100 W for 220 V ac...

A light bulb is rated 100 W for 220 V ac supply of 50 Hz. Calculate
the resistance of the bulb ,

Text Solution

Verified by Experts

200 V = rms supply voltage = equivalent dc voltage
`P=(V^(2))/(R)" or, " R=(V^(2))/(P)=(200)^(2)/(100)=484Omega`
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