Physics · May / June 2021 · Paper 11 · Question 34

The diagram shows a current-carrying conductor between the poles of a magnet. The force on the wire acts downwards. Four changes are possible. 1 The current is increased. 2 A stronger magnet is used. 3 The current is reversed. 4 The poles exchange positions. Which two changes made together keep the force acting downwards?

1. A1 and 3
2. B2 and 3
3. C2 and 4
4. D3 and 4

As printed in the paper