Physics (AS & A Level) · Feb / March 2025 · Paper 12 · Question 30

Two cylindrical conductors, X and Y, are made from the same material. The conductors have equal lengths, but Y has a smaller diameter than X. X and Y are connected in series to a cell. Which row compares the number of charge carriers per unit time passing through X and through Y and compares the average drift speed of the charge carriers in X and in Y?

1. AY greater than X | Y greater than X
2. BY same as X | Y same as X
3. CY greater than X | Y same as X
4. DY same as X | Y greater than X

As printed in the paper