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NEET 1997 (AIPMT) · Electrical Power & Heating Effect

Electrical Power & Heating Effect question from NEET 1997 (AIPMT)

Q97NEET 1997 · AIPMTEasy

Electrical Power & Heating Effect

A (100 W, 200 V) bulb is connected to a 160 volts supply. The power consumption would be

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Answer: (c)

Resistance is fixed, so $P \propto V^2$ .
$P' = 100 \times \left(\frac{160}{200}\right)^2 = 100 \times 0.64 = 64\ \text{W}$ .
So the answer is (c) 64 W.

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