how find potential difference across the resistor when the expression for the heat developed in a resistor by the passage of electric current through it 220J of heat is produced each second in a 8 ohm resistor
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Heat = I^2 RT joules
But V=IR (ohms law)
So I = V/R
Substituting I we get
V^2/ R^2 × RT joules
It gives V^2T/R joules
220 = V^2 × 1 sec/ 8 ohms now
220 × 8 = v^2 and hence it comes to ~ 41.9
But V=IR (ohms law)
So I = V/R
Substituting I we get
V^2/ R^2 × RT joules
It gives V^2T/R joules
220 = V^2 × 1 sec/ 8 ohms now
220 × 8 = v^2 and hence it comes to ~ 41.9
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