The resistance of the filament of a lamp...

The resistance of the filament of a lamp increases with the increase in temperature. A lamp rated `100 W` and `220 V` is connected across `220 V` power supply. If the voltage drops by `10%`, then the power of the lamp will be

A

90 W

B

81 W

C

Between 90 W and 100 W

D

Between 81 W and 90 W

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The correct Answer is:

D

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