Q. 4

# A short magnet is

Lenz's law: The direction of the induced current is such that it opposes the magnetic field that has induced it.

See fig.(a). In that, the north pole is facing towards the loop. According to Lenz’s law, the direction of induced current will be anticlockwise. And the magnet is coming towards the loop. Then the flux through the loop will increase; it will create a magnetic field. This newly generated magnetic field will cancel the original magnetic field. Therefore the loops get repelled.

See fig.(b) in which the magnetic is moving away from the loop. It will lead to a decrease in the magnetic field intensity. Therefore, flux through the loop decreases. Therefore, flux through the loop decreases. According to Lenz's law in induced current produces a magnetic field in the opposite direction of the original field. Hence the loop attracts the magnet.

Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
view all courses
RELATED QUESTIONS :

A wire in the forPhysics - Exemplar

Consider a metal Physics - Exemplar

A solenoid is conPhysics - Exemplar

Consider a metal Physics - Exemplar

Five charges, q ePhysics - Exemplar

Find the current Physics - Exemplar

A solenoid is conPhysics - Exemplar

A (current vs timPhysics - Exemplar

The battery discuHC Verma - Concepts of Physics Part 2

A metal sheet is HC Verma - Concepts of Physics Part 2