Maths And Physics With Pandey Sir Ncert 12th Physics Chapter-5 Torque on a Magnetic Dipole (bar magnet) in a Uniform Magnetic Field

Torque on a Magnetic Dipole (bar magnet) in a Uniform Magnetic Field

Torque on a Magnetic Dipole (bar magnet) in a Uniform Magnetic Field:

Let a bar magnet is placed in a uniform magnetic field B. The length of the bar magnet is 2l and strength of each pole m.

The magnet is held at angle theta with the direction of B.

 

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These equal and opposite forces from a couple which tends to rotate the magnet clockwise.
 
 Torque acting on the bar magnet-
 
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