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

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An electric bulb is rated 220 volt - 100 watt. The power consumed by it when operated on 110 volt will be
A. `50` watt
B. `75` watt
C. `40` watt
D. `25` watt
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Correct Answer - D
`H_(1)=(V^(2))/Rt & H_(2)=(V^(2))/(R//2)t`
`:. (H_(2))/(H_(1))=2implies H_(2)=2H_(1)`
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