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The work done in rotating a bar magnet o...

The work done in rotating a bar magnet of magnetic moment M from its unstable equilibrium position to its stable equilibrium position in a uniform magnetic field B is

A

2MB

B

MB

C

`-MB`

D

`-2MB`

Text Solution

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The correct Answer is:
D
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AAKASH INSTITUTE-MAGNETISM AND MATTER -ASSIGNMENT (SECTION B)
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  7. The value of horizontal component of earth's magnetic field at a place...

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  8. The period of oscillation of a magnet of a vibraion magnetometer is 2....

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  9. If phi is lattitude and del is dip at a place then

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  11. Magnetic susceptibility of a diamagnetic substances

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  12. Area of B-H curve measures the energy loss

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  15. What is the unit of magnetic susceptibility?

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  16. One weber is equal to

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  17. The number of turns and radius of cross-section of the coil of a tange...

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  18. Two short bar magnets of magnetic moments 'M' each are arranged at the...

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  19. The work done in rotating a bar magnet of magnetic moment M from its u...

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  20. The variation of magnetic susceptibility (chi) with absolute temperatu...

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