Answer to Question #340977 in Electricity and Magnetism for Sophie

Question

A circular loop of wire of radius 0.25 cm is expected to an external magnetic field that is perpendicular to the plane of the loop. For a time, the magnetic field decreases at a rate of 0.0035 T/s. What is the magnitude of the induced electromagnetic force in the loop? 

Answer 1

$F=\pi r^2 B=6.9\cdot 10^{-8}~N.$