Question

100j of heat produced each second in a 4ohm resistance. find the potential difference across the resistor ?​

Answer 1

★ See this attachment...

Answer 2

Heat produced per second , H = V^2 /R

As H = 100 J/s

R = 4 ohm

so, 100 = V^2 / 4

or, V^2 = 400

so, V = 20 V

So, 20 V is the pd across the resistors.

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