Physics (AS & A Level) · May / June 2017 · Paper 12 · Question 4

The current in a block of semiconductor is 30.0 mA when there is a potential difference (p.d.) of 10.0 V across it. The dimensions of the block and the direction of the current in it are as shown. The electrical meters used are accurate to ± 0.1 mA and ± 0.1 V. The dimensions of the block are accurate to ± 0.2 mm. What is the resistivity of the semiconductor?

1. A10.0 ± 0.2 Ω m
2. B10.0 ± 0.3 Ω m
3. C10.0 ± 0.5 Ω m
4. D10.0 ± 0.8 Ω m

As printed in the paper