Questions
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
detailed solution
Correct option is A
P=V2R=V2R−1⇒(ΔPP)max×100%=2(ΔVV)×100%+(ΔRR)×100%∴ (ΔPP)max×100%=2×1%+2%=4%Talk to our academic expert!
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A resistor R is connected across a battery of emf 12 V. It observed that terminal potential differenceis 9 V and the power delivered to resistor is 18 W. Internal resistance of the battery ‘r’ and the resistance R are respectively
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