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Question
100 joules of heat is produced per second in a 4 ohm resistor. What is the potential difference across the resistor?
Solution
Given R = 4 Ω
H = 100 J
t = 1 s
We know that, H = I2Rt
`rho=H/Rt=100/(4xx1)=25A^2`
I = 5 A
Now: V = I
V = 5 x 4 = 20 V
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