If a bar magnet moment M is freely suspended in a uniform magnetic field of strength field of strength B, then the work done in rotating the magent th

Question

If a bar magnet moment M is freely suspended in a uniform magnetic field of strength field of strength B, then the work done in rotating the magent th

If a bar magnet moment M is freely suspended in a uniform magnetic field of strength field of strength B, then the work done in rotating the magent through an angle `theta` is
A. `MB(1-sin theta)`
B. `MBsin theta`
C. `MB cos theta`
D. `MB(1-cos theta)`

Monjur Alahi

5 views

2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Salim Ahmed Kawsar

Work done is rotating the magnet through an angle `theta` from initial position `(i.e.,theta_(1)=0^(@))` is given by
`W=MB(cos theta _(1)-cos theta)=MB(cos 0^(@)-cos theta)=MB(1-costheta)`

5 views Answered 2023-02-05 15:29