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JEE · NEET Previous Year Question

$Two bulbs of (40 W, 200 V), and (100 W, 200 V) . Then correct relation for their resistances$

Topic: NEET PYQ

Answer: B. Full step-by-step solution below.

A $R_{40} < R_{100}$
B $R_{40} > R_{100}$
C $R_{40} = R_{100}$
D $no relation can be predicted.$

Correct answer: B

Solution

(b) P = \frac{V ^{2}}{R} or, R \propto \frac{1}{P} ∴ R_{40} > R_{100}

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