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An electric bulb is rated 220 volt - 100...

An electric bulb is rated 220 volt - 100 watt. The power consumed by it when operated on 110 volt will be

A

75 watt

B

40 watt

C

25 watt

D

50 watt

Text Solution

Verified by Experts

The correct Answer is:
C
(c) The resistance of the bulb is `R = V62/P = (220)^2/100`
The power consumed when operated at 110 V is
`P = (110)^2/((200)^2//100) = 100/4 = 25W`.
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