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MHT CET 202621 AprilMorning Shift

Exam: MHT CET
Year: 2026
Date: 21 April
Shift: Morning Shift
Subject: Physics
Chapter: Magnetic Properties of Matter

MHT CET 2026 · 21 April · Morning Shift · Physics · Magnetic Properties of Matter

Magnetic susceptibility ( ) is related to magnetic relative...

Magnetic susceptibility (\chi

) is related to magnetic relative permeability (\mu_r

) by the relation

Options

A $\chi = 1 / (\mu_r - 1)$
B $\chi = \mu_r + 1$
C $\chi = \mu_r - 1$
D $1 / (\mu_r + 1)$

Correct answer

C. $\chi = \mu_r - 1$

Step-by-step solution

The magnetic permeability of a material is given by

\mu = \mu_0 (1 + \chi)

, where

\chi

is the magnetic susceptibility.

The relative magnetic permeability is defined as

\mu_r = \dfrac{\mu}{\mu_0}

.

Substituting this into the first equation gives

\mu_r = 1 + \chi

.

Rearranging the terms, we get

\chi = \mu_r - 1

.

Answer:

\chi = \mu_r - 1

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