NEET 2009 Physics question
Not in JEE Advanced syllabus
A bar magnet having a magnetic moment of is free to rotate in a horizontal plane. A horizontal magnetic field exists in the space. The work done in taking the magnet slowly from a direction parallel to the field to a direction from the field is:
Answer: (2)
Solution
Work done in rotating a magnetic dipole from angle to against the field: . Here , : $W = MB(1 -
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