First slide
Magnetic dipole in a uniform magnetic field
Question

A magnetic needle, suspended horizontally by an unspun silk fibre, oscillates in the horizontal plane, because of a restoring force originating mainly from

Moderate
Solution

force acting on the magnetic pole of pole strength m is F= m BH and  is the reason for restoring torque. 

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