Question

The range of magnetic susceptibility and relative magnetic permeability for diamagnetic substances are:

• A. $-1\ge X>0,0\le {\mu }_r<1$
• B. $-1\le X>0,0\ge {\mu }_r<1$
• C. $-1\ge X>1,0\le {\mu }_r<1$
• D. $-1\le X<0,0\le {\mu }_r<1$

Answer 1

Answer: (D)

$-1\le X<0,0\le {\mu }_r<1$

Theory states that susceptibility of diamagnetic substances as,

$-1\le X\le 0$

Relation between $X$ and ${\mu }_r$

$\Rightarrow X_m={\mu }_r-1$

$\Rightarrow {\mu }_r=1+X_m$

$\Rightarrow -1\le X\le 0$, add one.

$\Rightarrow 0\le 1+X\le 1,0\le {\mu }_r\le 1$