NEET 2017 Physics question
A 250-Turn rectangular coil of length 2.1 cm and width 1.25 cm carries a current of 85 A and subjected to a magnetic field of strength 0.85 T. Work done for rotating the coil by against the torque is
Answer: (1)
Solution
Work done in rotating a magnetic dipole from angle to is . For a rotation by starting from the stable position, . , so $W =
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