Class/Course - Class XII

Subject - Physics

Chapter - Magnetism and Matter

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Q.1 A bar magnet having a magnetic moment of 2 x 104 JT-1 is free to rotate in a horizontal plane. A horizontal magnetic field B = 6 x 10-4 T exists in the space.The work done is taking the magnet slowly from a direction parallel to the field to a direction 600 from the field is
  0.6 J
  12 J
  6 J
  2 J