A magnet is parallel to a uniform magnetic field. If it is rotated by 
, the work done is 0.8 J. How much work is done in moving it 
further
A
B
0.4 J
C
8 J
D
0.8 ergs
Text Solution
Verified by ExpertsThe correct answer is:
A
When the magnet is rotated from 
to 
, then work done is 0.8 J
In order to rotate the magnet through an angle of 
, i.e., from 
to 
, the work done is
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