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Physics - Magnetism Question with Solution | TestHub

PhysicsMagnetismProperties of magnetEasy2 minPYQ_2020

PhysicsEasysingle choice

A circular loop with $N$ turns has radius $r$ . It lies in the x-y plane carrying current $I$ in the anti-clockwise direction. If the magnetic field in the region is $\vec{B} = B_{0} \hat{i},$ then find the torque $(\vec{τ})$ acting on the loop.

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Answer:

Solution:

Magnetic moment $\vec{M} = N I (π r^{2}) \hat{k}$
Torque $\vec{τ} = \vec{M} \times \vec{B}$
$= (N I (π r^{2}) \hat{k}) \times (B_{0} \hat{i})$
$= B_{0} N I π r^{2} \hat{j} N m$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:MagnetismSubtopic:Properties of magnet

⏱ 2mℹ️ Source: PYQ_2020

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