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Vectors and Its Types

The factor on...

Question

The factor on which the period of oscillation of a bar magnet in uniform magnetic field depends is

nature of suspension fibre

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length of the suspension fibre

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vertical component of earths magnetic induction

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moment of inertia of the magnet

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Solution

The correct option is D moment of inertia of the magnet
The time period of oscillation is given by
$T = 2 π \sqrt{\frac{I}{m B_{H}}}$
Therefore $T$ is proportional to $\sqrt{I}$

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When a bar magnet is suspended freely in a uniform magnetic field, identify the correct statements:

a) The magnet experiences only couple and undergoes only rotatory motion

b) The direction of torque is along the suspension wire

c) The magnitude of torque is maximum when the magnet is normal to the field direction

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