An 18.5-cm-diameter loop of wire is initially oriented perpendicular to a 1.5-T magnetic field. The loop is rotated so that its plane is parallel to the field direction in 0.20 s. What is the average induced emf in the loop?

The average induced emf in the loop is 0.20 V

Explanation:

Given:

Radius of loop m

Magnetic field T

Change in time sec

According to the faraday's law,

Induced emf is given by

Where magnetic flux

                                 ( here )      

Where

We neglect minus sign because it's shows lenz law

    V

Therefore, the average induced emf in the loop is 0.20 V