Q.

Statement 1: Two electric bulbs of 50 W and 100 W are given. When connected in series, 50 w bulb glows more but when connected in parallel, 100 W bulb glows more. Statement 2: In series combination, power is directly proportional to the resistance of circuit. But in parallel combination, power is inversely proportional to the resistance of the circuit.

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a

Both statements 1 and 2 are correct

b

Statement 1 is correct statement 2 is incorrect

c

Statement 1 is incorrect statement 2 is correct

d

Both statements 1 and 2 are incorrect

answer is A.

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Detailed Solution

Resistance of 50 W bulb is two times the resistance of 100 W bulb. When bulbs are connected in series, 50 W bulb will glow more as P = i2R (current remains same in series). In parallel, the 100 W bulb will glow more as P = V2/R(potential difference remain same in parallel).
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Statement 1: Two electric bulbs of 50 W and 100 W are given. When connected in series, 50 w bulb glows more but when connected in parallel, 100 W bulb glows more. Statement 2: In series combination, power is directly proportional to the resistance of circuit. But in parallel combination, power is inversely proportional to the resistance of the circuit.