Published by:
CGP EDU Academic Team
Published on: September 13, 2026
A magnetic needle suspended parallel to a magnetic field requires 
of work to turn it through 
. The torque needed to maintain the needle in this position will be:
A
B
3 J
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
According to work energy theorem
…… ..(i)
……… (ii)
From equation (i) and (ii)
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