Physics · Oct / Nov 2022 · Paper 12 · Question 38

The diagram shows a relay used to switch on an electric motor. A student makes five statements to explain how the relay switches on the electric motor. The statements are not in the correct order. 1 The current in the coil magnetises the electromagnet. 2 The armature closes the contacts. 3 The current in the secondary circuit makes the motor turn. 4 The electromagnet attracts the iron armature. 5 The switch S in the primary circuit is closed. What is the correct order of the statements?

1. A1 → 5 → 2 → 4 → 3
2. B3 → 2 → 4 → 1 → 5
3. C3 → 4 → 1 → 5 → 2
4. D5 → 1 → 4 → 2 → 3

As printed in the paper