A Strong Electromagnet Produces a Uniform Magnetic Field of 0

A strong electromagnet produces a uniform magnetic field of 0.50 T over a circular cross-section of radius 25 cm. A circular coil with 100 turns and a total resistance of 40.00 Ù is placed around the electromagnet. The current is smoothly reduced in the electromagnet until it reaches zero in 50.00 ms. What is the current induced in the coil?

A) 0.41 A
B) 0.78 A
C) 0.81 A
D) 1.56 A