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JEE Main 2003 (AIEEE) · Electrical Power & Heating Effect

Electrical Power & Heating Effect question from JEE Main 2003 (AIEEE)

Q83JEE Main 2003 · AIEEEEasy

Electrical Power & Heating Effect

A $220$ volt, $1000$ watt bulb is connected across a $110\text{ volt}$ mains supply. The power consumed will be

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Answer: (c)

Fixed resistance: $P \propto V^2$ .
$P' = 1000 \times \left(\frac{110}{220}\right)^2 = 250\ \text{W}$ .
So the answer is (c) 250 watt.

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