Question

1 .400 joules of heat is produced per second in a 16 ohm resistor. find the potential difference across the resistor.



2. what will happen to the heat produced if the current passing through an electric heater has been halved...​

Answer 1

here's your answer

H = I² R T

400J = I² × 16 × 1

400/16 = I²

25 = I²

I = 5

now for V,

V = IR

V = 16 × 5

V = 80

Hence the potential difference is 80 units