A magnet of magnetic moment `2JT^(-1)` is aligned in the direction of magnetic field of `0.1T`. What is the net work done to bring the magnet normal to the magnrtic field?A. `0.1J`B. `0.2 J`C. `1 J`D. `2 J`

A magnet of magnetic moment `2JT^(-1)` is aligned in the direction of

1.	A magnet of magnetic moment `2JT^(-1)` is aligned in the direction of magnetic field of `0.1T`. What is the net work done to bring the magnet normal to the magnrtic field?A. `0.1J`B. `0.2 J`C. `1 J`D. `2 J`
Answer» Correct Answer - B Work done in rotating in the magnetic in uniform magnetic field is given by `W=MB(cos theta_(1)-cos theta_(2))` `Here, theta_(1)=0^(@) and theta_(2)=90^(@)` `therefore " " W=2xx0.1(cos0^(@)-cos90^(@))` `=2xx0.1(1-0)=0.2J`

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A magnet of magnetic moment `2JT^(-1)` is aligned in the direction of magnetic field of `0.1T`. What is the net work done to bring the magnet normal to the magnrtic field?A. `0.1J`B. `0.2 J`C. `1 J`D. `2 J`

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