1.

A 250 – Turn rectangular coil of length 2.1 cm and width 1.25 cm carries a current of 85 μA are subjected to a magnetic field of strength 0.85T. Work done for rotating the coil by 180º against the torque is :

A. 9.1 μJ
B. 4.55 μJ
C. 2.3 μJ
D. 1.15 μJ
Answer» B. 4.55 μJ


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