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Physics - Magnetism Question with Solution | TestHub

PhysicsMagnetismMagnetic Dipole & MomentEasy2 minPYQ_2020

PhysicsEasysingle choice

The ratio of the magnetic field at the centre of a current carrying circular coil to its magnetic moment is $x$ . If the current and radius both are doubled the new ratio will become

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Answer:

Solution:

$x = \frac{B}{M} = (\frac{μ_{0} i}{2 r}) (\frac{1}{i π r^{2}}) or x \propto \frac{1}{r^{3}}$

i.e., x will become $\frac{x}{8}$ when radius and current both are doubled.

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:MagnetismSubtopic:Magnetic Dipole & Moment

⏱ 2mℹ️ Source: PYQ_2020

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