Q161 / 200 · MHT CET - Medical 2026 (21 April Shift 1) · Physics
Magnetic susceptibility ($\chi$) is related to magnetic relative permeability ($\mu_r$) by the relation
- A$\chi = 1 / (\mu_r - 1)$
- B$\chi = \mu_r + 1$
- Correct answerC$\chi = \mu_r - 1$
- D$1 / (\mu_r + 1)$
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: $\chi = \mu_r - 1$
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: $\chi = \mu_r - 1$
Hence, the correct answer is option: 'C'.