Physics (AS & A Level) · Oct / Nov 2021 · Paper 11 · Question 2

The mobility μ of electrons travelling through a metal conductor can be calculated using the equation μ = (e/m) τ where e is the charge on an electron and m is its mass. The average time between the collisions of an electron with the atoms in the metal is τ. What are the SI base units of μ?

1. AA kg⁻¹
2. BA s² kg⁻¹
3. CA s kg⁻¹
4. DA s⁻² kg⁻¹

As printed in the paper