Questions
Two wires A and B of same material and mass have their lengths in the ratio 1 : 2. On connecting them to the same source, the rate of heat dissipation in B is found to be 5 W. The rate of heat dissipation in A is
detailed solution
Correct option is C
Ht =P = V2R ⇒ P ∝ 1R ; Also R ∝ lA∝ l2ρA.lρ⇒ R ∝ l2m ⇒ R ∝ l2 for same massSo PAPB = lB2lA2 = 41 ⇒ PA =20 WTalk to our academic expert!
Similar Questions
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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