Physics (AS & A Level) · Oct / Nov 2017 · Paper 13 · Question 2

The maximum theoretical power $P$ of a wind turbine is given by the equation $P = k\rho A v^n$ where $\rho$ is the density of air, $A$ is the area swept by the turbine blades, $v$ is the speed of the air and $k$ is a constant with no units. What is the value of $n$?

1. A1
2. B2
3. C3
4. D4

As printed in the paper