A Rectangular Wire Loop (Length = 60 Cm, Width =

Multiple Choice

A rectangular wire loop (length = 60 cm, width = 40 cm) lies completely within a perpendicular and uniform magnetic field of magnitude of 0.5 T. If the length of the loop starts increasing at a rate of 20 mm/s at time t = 0, while the width is decreasing at the same rate, what is the magnitude of the induced emf at time t = 4.0 s?

A) 6.8 mV
B) 5.2 mV
C) 3.6 mV
D) 8.4 mV
E) 10 mV