Walker, Halliday & Resnick — Induction and Inductance: Problem 43

43 As seen in Fig. 30-39, a square loop of wire has sides of length 3.0 cm. A magnetic field is directed out of the page; its magnitude is given by \(B = 5.0t^2y\), where \(B\) is in teslas, \(t\) is in seconds, and \(y\) is in meters. At \(t = 2.5 \text{ s}\), what are the (a) magnitude and (b) direction of the emf induced in the loop?