A Circular Coil of 20 Turns and Radius 5 Cms

Multiple Choice

A circular coil of 20 turns and radius 5 cms is placed with its plane oriented at 90° to a magnetic field of 0.1 T.The field is now increased at a steady rate,reaching a value of 0.5 T after 4 seconds.What emf is induced in the coil?

A) 0.016 V
B) 0.021 V
C) 0.026 V
D) 0.031 V
E) 0.036 V