The Magnetic Field Inside a Circular Loop of Wire of Radius

Multiple Choice

The magnetic field inside a circular loop of wire of radius 30 cm increases at a constant rate from 2.0 × 10^-3 T to 3.5 × 10^-3 T in 0.47 s.What is the induced emf in the wire?

A) 9.0 ×10^-4 V
B) 2.3 ×10^-4 V
C) 1.8 ×10^-3 V
D) 1.8 ×10^-4 V