A Square Loop (Length Along One Side = 20 Cm)

A square loop (length along one side = 20 cm) rotates in a constant magnetic field which has a magnitude of 2.0 T. At an instant when the angle between the field and the normal to the plane of the loop is equal to 20° and increasing at the rate of 10°/s, what is the magnitude of the induced emf in the loop?

A) 13 mV
B) 0.27 V
C) 4.8 mV
D) 14 mV
E) 2.2 mV