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1.	A coil of resistance 100Ω is connected across a battery of emf 6.0V. Assume that the heat developed in the coil is used to raise its temperature. If the heat capacity of the coil is 4.0J/K, how long will it take to raise the temperature of the coil by 15° C?
Answer» R = 100Ω, E = 6v Heat capacity of the coil = 4J/k ΔT = 15°c Heat liberate => E²/Rt= 4J/K × 15 => (6 x 6)/100 x t = 60 => t = 166.67sec = 2.8min

A coil of resistance 100Ω is connected across a battery of emf 6.0V. Assume that the heat developed in the coil is used to raise its temperature. If the heat capacity of the coil is 4.0J/K, how long will it take to raise the temperature of the coil by 15° C?

Answer»

R = 100Ω, E = 6v

Heat capacity of the coil = 4J/k ΔT = 15°c

Heat liberate => E²/Rt= 4J/K × 15

=> (6 x 6)/100 x t = 60 => t = 166.67sec = 2.8min

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