First slide
Magnetic flux and induced emf
Question

The north pole of a bar magnet is moved swiftly downward towards a closed coil and then second time it is raised upwards slowly. The magnitude and direction of the induced currents in the two cases will be of

Moderate
Solution

When it is moving towards the coil, the field lines enclosed in it will be increasing (using Lenz’s Law).To counter the change the induced current in the coil will be in anticlockwise direction.When the bar magnet is moving away, field lines will be decreasing and the induced current will be in clockwise direction.

Get Instant Solutions
When in doubt download our app. Now available Google Play Store- Doubts App
Download Now
Doubts App