Questions

A conducting loop of radius R is present in a uniform magnetic field B perpendicular to the plane of the ring. If radius R varies as a function of time t, as R = R₀ + t. The emf induced in the loop is

Unlock the full solution & master the concept.

Get a detailed solution and exclusive access to our masterclass to ensure you never miss a concept

By Expert Faculty of Sri Chaitanya

2πR0+tB clockwise

πR0+tB clockwise

2πR0+tB anticlockwise

Zero

NEW

Ready to Test Your Skills?

Check Your Performance Today with our Free Mock Tests used by Toppers!

detailed solution

Correct option is C

Given, R = R0 + tA=πR2=πR0+t2;dAdt=2πR0+tTherefore, emf induced in the loop ise=BdAdt=2πR0+tBSince area is increasing, induced emf is in anticlockwise sense to oppose the change in flux.

Similar Questions

An elasticized conducting band r is around a spherical balloon T (figure). Its plane passes through the center of the balloon. A uniform magnetic field of magnitude 0.04 T is directed perpendicular to the plane of the band. Air is let out of the balloon at 100 cm³s^-1 at an instant when the radius of the balloon is 10 cm. The induced emf in the band is