Physics (AS & A Level) · Oct / Nov 2018 · Paper 13 · Question 34

Gold is sometimes used to make very small connecting wires in electronic circuits. A particular gold wire has length 2.50 × 10⁻³ m and cross-sectional area 6.25 × 10⁻⁸ m². Gold has resistivity 2.30 × 10⁻⁸ Ω m. What is the resistance of the wire?

1. A3.6 × 10⁻¹⁸ Ω
2. B5.8 × 10⁻¹³ Ω
3. C9.2 × 10⁻⁴ Ω
4. D6.8 × 10⁻³ Ω

As printed in the paper