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AIIMS 2013

Exam: AIIMS
Year: 2013
Subject: Physics
Chapter: Magnetic Effects of Current

AIIMS 2013 · Physics · Magnetic Effects of Current

Relation between magnetic moment and angular velocity is

Relation between magnetic moment and angular velocity is

Options

A $M \propto \omega$
B $M \propto \omega^2$
C $M \propto \sqrt{\omega}$
DNone of these

Correct answer

A. $M \propto \omega$

Step-by-step solution

Magnetic moment,

M=I A=I\left(\pi r^2\right)=\frac{q}{T} \times \pi r^2

(\because q=I t)

As

\quad \omega=\frac{2 \pi}{T}

\therefore \quad M=\frac{q \omega r^2}{2}

or

M \propto \omega

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