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A magnet of total magnetic moment 10^(-2...

A magnet of total magnetic moment `10^(-2)hati " A-m"^(2)` is placed in a time varying magnetic field, `Bhati(cosomegat)` where B = 1 Tesla and `omega` = 0.125 rad/s. The work done for reversing the direction of the magnetic moment at t = 1 second, is :

A

`0.0198`J

B

`0.007`J

C

`0.014`J

D

`0.01J`

Text Solution

Verified by Experts

The correct Answer is:
A
`V_(i) = - MB cos (1/8),V_(f) = MB cos (1/8)`
`W = 2MB cos (1/8) = 0.0198 J ` .
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