Physics (AS & A Level) · Feb / March 2019 · Paper 12 · Question 35

A wire of cross-sectional area 5.0 × 10–6 m2 is made of a metal of resistivity 50 × 10–8 Ω m. The potential difference across the wire is 6.0 V and the current is 3.0 A. What is the length of the wire?

1. A0.050 m
2. B0.20 m
3. C5.0 m
4. D20 m

As printed in the paper