Describe the action of negative temperature coefficient (NTC) thermistors and light-dependent resistors and explain their use as input sensors

State the differences between the properties of temporary magnets (made of soft iron) and the properties of permanent magnets (made of steel)

Know that a mains circuit consists of a live wire (line wire), a neutral wire and an earth wire and explain why a switch must be connected into the live wire for the circuit to be switched off safely