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.If the resistance of the loop is 0.31 Ω,what is the current in the loop?

A) 7.4 × 10^-4 A
B) 5.8 × 10^-4 A
C) 2.9 × 10^-3 A
D) 5.8 × 10^-3 A