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A magnetic needle lying parallel to a ma...

A magnetic needle lying parallel to a magnetic field requires X units of work to turn it through `60^(@)` . The torque necessary to maintain the needle in this position is

A

W

B

`sqrt3W `

C

`(sqrt (3W))/(2)`

D

`2W`

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The correct Answer is:
B
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AAKASH INSTITUTE ENGLISH-MAGNETISM AND MATTER -ASSIGNMENT (SECTION A)
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