Chapter 13, Problem 10CQ

The normal to tt plane of a single-turn conducting loop is directed at an angle $\theta$to a spatially uniform

magnetic field $\stackrel{\to }{B}$. It has a fixed area and orientation relative to the magnetic fleck Show that the emf induced In the loop is given by i = $\left(dB/dt\right)\left(A\cos \theta \right),$where A is the area of the loop.