Answer
$17mV$
Work Step by Step
We know that
$N=\frac{L}{C}=\frac{L}{2\pi r}$
$\implies N=\frac{1.6}{(2)(0.032)\pi}$
$N=8$
Now $\epsilon_{max}=NAB\omega$
We plug in the known values to obtain:
$\epsilon_{max}=\pi(8)(0.075)(0.032)^2(85rev/min)(\frac{2\pi rad}{rev})(\frac{1min}{60})$
$\epsilon_{max}=17mV$