If a coil of wire in a magnetic field rotates 60 degrees, it provides an emf averaging 3.0 V. If the coil consists of 10 loops of radius 0.5 m and the magnetic field has strength 5T, how long does the coil take to complete its rotation? Assume the coil is initially parallel to the field.

t = 6.5 s

t = 2.1 s

t = 2.2 s

0.7 V