Physics (AS & A Level) · May / June 2018 · Paper 13 · Question 33

A metal wire of length 1.4 m has a uniform cross-sectional area of $7.8 \times 10^{-7}\,\mathrm{m^2}$. The resistivity of the metal is $1.7 \times 10^{-8}\,\Omega\,\mathrm{m}$. What is the resistance of the wire?

1. A0.016 Ω
2. B0.031 Ω
3. C33 Ω
4. D64 Ω

As printed in the paper