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Q.

A current carrying coil is placed in a uniform magnetic field with its plane making an angle of 60o with the direction of field. The coil experiences a torque of 0.5 N-m. What maximum possible torque can the coil experience in the same magnetic field?

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a

1 N-m

b

1.5 N-m

c

0.75 N-m

d

2 N-m

answer is C.

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Detailed Solution

detailed_solution_thumbnail

Initially, MBsin⁡30o=0.5⇒MB=0.5×2=1

The coil experiences maximum torque when its plane becomes parallel to the field. 

∴ τmax⁡=MBsin⁡90o=1 N−m

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