A magnet of magnetic moment M is rotated through `360^(@)` in a magnetic field H, the work done will be
A
MH
B
2MH
C
`2piMH`
D
zero
Text Solution
Verified by Experts
The correct Answer is:
D
Topper's Solved these Questions
MAGNETISM
ERRORLESS |Exercise Magnet and it s Properties|15 Videos
MAGNETISM
ERRORLESS |Exercise Earth Magnetism|8 Videos
MAGNETIC EFFECT OF CURRENT
ERRORLESS |Exercise Exercise|394 Videos
RAY OPTICS
ERRORLESS |Exercise SET|25 Videos
Similar Questions
Explore conceptually related problems
A bar magnet of magnetic moment M_(1) is suspended by a wire in a magnetic field. The upper end of the wire is rotated through 180^(@) , then the magnet rotated through 45^(@) . Under similar conditions another magnetic of magnetic moment M_(2) is rotated through 30^(0) . Then find the ratio of M_(1)&M_(2) .
A bar magnet of magnetic moment M is hung by a thin cotton thread in a uniform magnetic field B. Work done by the external agent to rotate the bar magnet from stable equilibrium position to 120° with the direction of magnetic field is (consider change in angular speed is zero)
A magnet of magnetic moment M is situated with its axis along the direction of a magnetic field of strength B . The work done in rotating it by an angle of 180^(@) will be
A bar magnet of magnetic moment 6 J//T is aligned at 60^(@) with a uniform external magnetic field of 0.44 T. Calculate (a) the work done in turning the magnet to align its magnetic moment (i) normal to the magnetic field, (ii) opposite to the magnetic field, and (b) the torque on the magnet in the final orientation in case (ii).
A bar magnet has a magnetic moment of 2.5 J/T and is placed in a magnetic field of 0.2 T. find the work done in turning the magnet from parallel to anti-parallel position relative to field direction.