Find the heat produced in joules when a current of 10 amperes flows through a connecting wire of resistance 2 × 10-2 ohms and heating element of resistance 250 ohms for 2 seconds.
Heat produced when current flows in the wire for 2 seconds
Q1 = I2Rt
Q1 = 10 x 10 x 2 x 10-2 x 2
Q1 = 4J
Heat produced in heating element in 2 seconds
Q2 = 10 x 10 x 250 x 2
Q2 = 50,000J
