If a circular loop of wire of radius 19.7 cm is located in a region where the spatially uniform magnetic field perpendicular to the plane of the loop is changing at a rate of +2.0 ✕ 10−3 T/s, find the value of the induced EMF in this loop due to this changing magnetic field.

Magnitude of induced emf will be

Explanation:

We have given radius of the circular loop r = 19.7 cm = 0.197 m

So area of the circular loop

It is given that magnetic field is changing as

Emf induced in the circular loop is equal to

So emf induced will be equal to

So magnitude of induced emf will be

hi there!

out of the two, (b) precision would be more reasonable.   however, both a and b could be pretty reasonable.

-awesomerepublic   : )