A circular loop of radius lies perpendicular to a uniform magnetic field

PHYSICS · Single correct · CBSE · Physics · Electromagnetic Induction · Electromagnetic Induction

Problem

A circular loop of radius

0.20\,\text{m}

lies perpendicular to a uniform magnetic field. At an instant when the field is

0.30\,\text T

, it is increasing at

0.050\,\text T\,\text s^{-1}

. Simultaneously, the loop’s area is shrinking at the rate

2.0\times10^{-4}\,\text{m}^2\,\text s^{-1}

. Find the magnitude of the induced emf in the loop at that instant. (a)

5.0\,\text{mV}

(b)

6.28\,\text{mV}

(c)

6.22\,\text{mV}

(d)

1.5\,\text{mV}