A Circular Coil of 20 Turns and Radius 5

Multiple Choice

A circular coil of 20 turns and radius 5.0 cm is placed with its plane oriented at 90° to a uniform magnetic field of 0.10 T. The field is now increased at a steady rate, reaching a value of 0.50 T after
4) 0 seconds. What emf is induced in the coil?

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