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A light bulb is rated at 100 W for a 220...

A light bulb is rated at 100 W for a 220 V ac supply . The resistance of the bulb is

A

`284 Omega`

B

`384 Omega`

C

`484 Omega`

D

`584 Omega`

Text Solution

Verified by Experts

The correct Answer is:
C
Here, `P = 100 W, V_("rms")=220 V`
Resistance of the bulb is
`R=(V_("rms")^(2))/(P)=((220)^(2))/(100)=484 Omega`
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