Question

A circular coil with 100 turns and a radius of 0.10 m is placed in a uniform magnetic

field so that it is perpendicular to the plane of the coil. The field changes uniformly

from zero to 0.4T in 2 seconds. Calculate the induced emf.

Answer 1

$\varepsilon=\frac{n \pi r^2B}t=0.63~V.$