A 50-Turn Circular Coil (Radius = 15 Cm)with a Total $\Omega$

Multiple Choice

A 50-turn circular coil (radius = 15 cm) with a total resistance of 4.0 $\Omega$ is placed in a uniform magnetic field directed perpendicularly to the plane of the coil.The magnitude of this field varies with time according to B = A sin ( $\alpha$ t) ,where A = 80 $\mu$ T and $\alpha$ = 50 $\pi$ rad/s.What is the magnitude of the current induced in the coil at t = 20 ms?

A) 11 mA
B) 18 mA
C) 14 mA
D) 22 mA
E) zero