GCSE Standard Questions: Electricity in the Home

Q1. A washing machine has an electric motor and an electric heater.

The resistance of the heater is 22 Ω. The mains voltage is 230 V.


(i) State the equation linking voltage, current and resistance.

(1 mark)

(ii) Show that the current in the heater is about 10 A when it is working.

(2 marks)

(b) The washing machine is fitted with a fuse rated at 13 A.

(i) Explain why the washing machine is fitted with a fuse.

(2 marks)

(ii) When the motor is working, the current in it is 1.74 A. Explain why it would not be sensible to replace the 13 A fuse with a 2 A fuse.

(2 marks)

(Total 7 marks)