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According to Joule's law, if the potential difference across a conductor having a material of specific resistance remains constant,then the heat produced in the conductor is directly proportional to
detailed solution
Correct option is D
P=V2R but R=ρlA ⇒ P=V2ρl/A = AV2ρl. Since AV2lis constant as per given conditions so P ∝1ρ.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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