Physics · May / June 2023 · Paper 11 · Question 32

When wire XY is moved downwards between the poles of a stationary magnet, an e.m.f. is produced across X and Y. Which action produces an e.m.f. across X and Y in the opposite direction?

1. AMove both the wire and the magnet upwards at the same speed.
2. BThe wire is kept stationary and the magnet is moved upwards.
3. CThe wire is moved downwards and the magnet is moved upwards.
4. DThe wire is moved upwards and the magnet is kept stationary.

As printed in the paper