Question

The magnetic flux density b is changing in magnitude at a constant rate db/dt. A given mass m of copper, drawn into a wire of radius a and formed into a circular loop of radius r is placed perpendicular to the field

b. The induced current in the loop is i. The resistivity of copper is and density is

d. The value of the induced current i is

Answer 1

The answer is explained in the image attached below. I hope it helps