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JEE Main20246 Apr 2024Evening ShiftPhysicsMagnetic Effects of CurrentActual

A coil having 100 turns, area of 5 10⁻³ ~m ^2 , carrying current of 1 ~mA is placed in uniform magnetic field of 0.20 ~T such a way that plane of coil is perpendicular to the magnetic field. The work done in turning the coil through 90^ is _______ J .

Correct answer

0

Step-by-step solution

aligned & W= U=U_f-U_i & W=(- . B )_f-(- . B )_i & =0+( B )_i & = (100 5 10⁻³ 1 10⁻³ ) 0.2 ~J & =1 10⁻⁴ ~J =100 J aligned

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