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A magnet of total magnetic moment 10 –2 i ˆ A-m 2 is placed in a time varying magnetic field, B i ˆ (cos ω t) where B = 1 Tesla and ω = 0.125 rad/s. The work done for reversing the direction of the magnetic moment at t = 1 second, is -

1. 0.014 J
2. 0.028 J
3. 0.01 J
4. 0.007 J CAREER POINT CAREER POINT , CP Tower, IPIA, Road No.1, Kota (Raj.), : 0744-6630500 | www.ecareerpoint.com Email: info@cpil.in Page # 6 JEE Main Online

Correct answer: 0.014 J

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