Published by:
CGP EDU Academic Team
Published on: August 21, 2026
A magnetic needle lying parallel to a magnetic field requires 
units of work to turn it through 
. What is the torque needed to maintain the needle in this position?
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
The work done,
Torque, 
(ii)
From Eqs. (i) and (ii), we get
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