Physics (AS & A Level) · May / June 2022 · Paper 13 · Question 32

Two wires, X and Y, are made from the same metal. The diameter of wire Y is twice that of wire X. Wire X, wire Y and a battery are connected in series. What is the ratio $\dfrac{\text{average drift speed of free electrons in wire X}}{\text{average drift speed of free electrons in wire Y}}$?

1. A$\dfrac{1}{4}$
2. B$\dfrac{1}{2}$
3. C$\dfrac{2}{1}$
4. D$\dfrac{4}{1}$

As printed in the paper