Physics (AS & A Level) · May / June 2022 · Paper 12 · Question 34

An iron wire has length 8.0 m and diameter 0.50 mm. The wire has resistance R. A second iron wire has length 2.0 m and diameter 1.0 mm. What is the resistance of the second wire?

1. A\frac{R}{16}
2. B\frac{R}{8}
3. C\frac{R}{2}
4. DR

As printed in the paper