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Question

If two electric bulbs one of 200 V40 W and other of 200 V100 W are connected in a domestic circuit, then

A
They have equal resistance
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B
The resistance of 100 W bulb is more than 40 W bulb
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C
They have equal current passing through them
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D
The resistance of 40 W bulb is more than 100 W bulb
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Solution

The correct option is D The resistance of 40 W bulb is more than 100 W bulb

Here, due to domestic circuit potential difference will be equal.
P=V2RP1R
so, a bulb having high power will have less resistance.

Hence, option D is correct.

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