An electric washing machine has a metal casing connected to an earth wire.
Why is the metal casing of the washing machine connected to the earth wire?
It improves the efficiency and rotation speed of the washing machine.
It provides a low-resistance safety path to earth to prevent the user from receiving an electric shock if the live wire touches the metal casing.
It acts as the return path for the electrical current during normal operation when the machine is running.
It prevents the metal casing from heating up due to friction.
135 exam-style questions on CIE IGCSE Physics Electrical safety, covering Electrical safety. Each one has a worked solution and a mark scheme showing where the marks go.