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Question (31)
QN0039132

If a magnetic dipole of moment  situated in the direction of a magnetic field  is rotated by , then the amount of work done is

  • (A)

  • (B)

  • (C)

  • (D)

Correct Answer: B
Explanation:

Work done in rotating the magnetic dipole from position  to

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Question (32)
QN0039133

A torque of  is required to hold a magnet at  with the horizontal component  of the earth's magnetic field. The torque to hold it at  will be 

  • (A)

  • (B)

    data is insufficient

  • (C)

  • (D)

Correct Answer: A
Explanation:

The torque acting on the magnet of magnetic moment , when held at angle  to magnetic field

.

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