Physics (AS & A Level) · May / June 2016 · Paper 11 · Question 31

Two copper wires of equal length are connected in parallel. A potential difference is applied across the ends of this parallel arrangement. Wire S has a diameter of 3.0 mm. Wire T has a diameter of 1.5 mm. What is the value of the ratio $\dfrac{\text{current in S}}{\text{current in T}}$?

1. A$\dfrac{1}{4}$
2. B$\dfrac{1}{2}$
3. C2
4. D4

As printed in the paper