An appliance, such as a washing machine, uses a mains power supply and has a metal case. The circuit includes a fuse.
Draw the electrical symbol for a fuse.
The metal case of the washing machine is earthed. A fault occurs and the live wire touches the metal exterior case. Explain how earthing the metal case protects a person from receiving an electric shock.
The washing machine contains a step-down transformer within its control circuit. The input voltage to this transformer is 230 V230\text{ V}230 V. There are 920920920 turns on the input coil and 484848 turns on the output coil.
Calculate the output voltage of the transformer.
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.