Chapter 23 - Magnetic Flux and Faraday's Law of Induction - Problems and Conceptual Exercises - Page 834: 93

$1.1\mu V$

We know that $\epsilon=(N)|\frac{\Delta \phi}{\Delta t}|$ $\epsilon=(N)|\frac{BA(cos90^{\circ}-cos^{\circ})}{\Delta t}|$ We plug in the known values to obtain: $\epsilon=(85)|\frac{\pi(1.5\times 10^{-4})(0.0010)^2}{37\times 10^{-3}}|=1.1\mu V$