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A light bulb is rated 100W for a 220V su...

A light bulb is rated 100W for a 220V supply. The resistance of the bulb and the peak voltage of the source respectively are

A

`242Omega` and 311 V

B

`484Omega` and `311V`

C

`484Omega` and 440V

D

`242Omega` and `440V`

Text Solution

Verified by Experts

Resistance of a bulb`=(("Rated voltage")^(2))/("Rated power")`
`=((220)^(2))/(100)=484Omega`
Peak voltage of the source.
`V_(0)=220sqrt(2)V=311V`
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