A magnetic needle lying parallel to a magnetic field requires W units – McqOptions

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1.	A magnetic needle lying parallel to a magnetic field requires W units of work to turn it through\[60{}^\circ \]. The torque required to maintain the needle in this position will be
A.	\[\sqrt{3}W\]
B.	W
C.	\[\frac{\sqrt{3}}{2}W\]
D.	2W
Answer» B. W

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