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Q.

A potential difference V is applied across a resistor of resistance R. If the voltage across the resistor increases by 1% and the resistance increases by 2%, then the maximum possible change in the power dissipated in the resistor is

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a

4%

b

3%

c

2%

d

5%

answer is A.

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Detailed Solution

P=V2R=V2R−1⇒(ΔPP)max⁡×100%=2(ΔVV)×100%+(ΔRR)×100%∴ (ΔPP)max⁡×100%=2×1%+2%=4%
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