Physics (AS & A Level) · May / June 2021 · Paper 12 · Question 32

A wedge-shaped metal conductor of length L, varying width and uniform thickness is connected to a cell, as shown. Which graph best shows how the average drift velocity v of electrons in the conductor varies with distance x from end X?

1. AGraph A: v decreasing curve from maximum at x=0 to minimum at x=L
2. BGraph B: v increasing curve from minimum at x=0 to maximum at x=L
3. CGraph C: v decreasing linearly from maximum at x=0 to zero at x=L
4. DGraph D: v increasing linearly from zero at x=0 to maximum at x=L

As printed in the paper