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Physics - Magnetism Question with Solution | TestHub

PhysicsMagnetismProperties of magnetEasy2 minPYQ_2020

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Two short bar magnets of dipole moments $M$ and $M \sqrt{3}$ are joined at right angles to form a cross as depicted in the figure. The value of $θ$ for which the system remains in equilibrium in a uniform external magnetic field $B$ , is

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Answer:

Solution:

Torque $(τ)$ acting on magnet (1),

$τ_{1} = MBsin θ$

Similarly, $τ_{2} = \sqrt{3} MBsin θ$

But for equilibrium, $τ_{1} = τ_{2}$

$∴ MBsin θ = \sqrt{3} MBcos θ$

$\tan θ = \sqrt{3} = \tan 60 °$

$∴ θ = 60 °$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:MagnetismSubtopic:Properties of magnet

⏱ 2mℹ️ Source: PYQ_2020

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