Physics (AS & A Level) · Oct / Nov 2022 · Paper 13 · Question 30

There is an electric current in a copper wire. Which statement describing the average drift speed of the charge carriers in the wire is correct?

1. AIt is nearly 3 × 10^8 m s–1.
2. BIt is proportional to the cross-sectional area of the wire.
3. CIt is proportional to the length of the wire.
4. DIt is proportional to the magnitude of the current.

As printed in the paper