A Circular Coil of 20 Turns and Radius 5 $\vec { B }$

Multiple Choice

A circular coil of 20 turns and radius 5.0 cm is placed with its plane oriented at 90° to a uniform $\vec { B }$ field of $0.10 \mathrm {~T}$ The field is now increased at a steady rate,reaching a value of $0.50 \mathrm {~T}$ after 4.0 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