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A current carrying coil is placed in a uniform magnetic field with its plane making an angle of $60^{o}$ 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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0.75 N-m

1.5 N-m

1 N-m

2 N-m

answer is C.

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Detailed Solution

Initially, $M B \sin 30^{o} = 0.5 \Rightarrow M B = 0.5 \times 2 = 1$

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

$∴ τ_{\max} = M B \sin 90^{o} = 1 N - m$

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