Physics (AS & A Level) · May / June 2018 · Paper 13 · Question 30

A slice of germanium of cross-sectional area 1.0 cm² carries a current of 56 µA. The number density of charge carriers in the germanium is 2.0 × 10¹³ cm⁻³. Each charge carrier has a charge equal to the charge on an electron. What is the average drift velocity of the charge carriers in the germanium?

1. A0.18 m s⁻¹
2. B18 m s⁻¹
3. C180 m s⁻¹
4. D1800 m s⁻¹

As printed in the paper