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If voltage across a bulb rated 22 volt 1...

If voltage across a bulb rated 22 volt 100 watt drops by 2.5% of its rated value, the percentage of the rated value by which the power would decrease is

A

0.05

B

0.1

C

0.2

D

0.025

Text Solution

Verified by Experts

The correct Answer is:
A
`(DeltaP)/P xx 100 = -2((DeltaV)/V xx 100) = -2(2.5) = -5%`
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