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(C) Given: $\mu_0 = 4 \pi 	imes 10^{-7} \ H/m$ and $\chi_m = 349$.The relationship between absolute permeability $\mu$,vacuum permeability $\mu_0$,an

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$4400 	imes 10^{-7}$

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(C) Given: $\mu_0 = 4 \pi 	imes 10^{-7} \ H/m$ and $\chi_m = 349$.The relationship between absolute permeability $\mu$,vacuum permeability $\mu_0$,and magnetic susceptibility $\chi_m$ is given by $\mu = \mu_0(1 + \chi_m)$.Substituting the values:$\mu = 4 \pi 	imes 10^{-7} 	imes (1 + 349)$$\mu = 4 \pi 	imes 10^{-7} 	imes 350$$\mu = 1400 \pi 	imes 10^{-7}$Using $\pi \approx 3.14159$:$\mu \approx 1400 	imes 3.14159 	imes 10^{-7}$$\mu \approx 4398.22 	imes 10^{-7} \ H/m$Rounding to the nearest significant value provided in the options,we get $\mu \approx 4400 	imes 10^{-7} \ H/m$.

The magnetic susceptibility of a material of a rod is $349$ and the permeability of vacuum $\mu_0$ is $4 \pi \times 10^{-7} \ SI$ units. The absolute permeability of the material of the rod in $SI$ units is:

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The magnetic induction and the intensity of the magnetic field inside an iron core of an electromagnet are $1 \ Wb \ m^{-2}$ and $150 \ A \ m^{-1}$, respectively. The relative permeability of iron is $(\mu_0 = 4 \pi \times 10^{-7} \ H \ m^{-1})$.

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Which of the following relations is incorrect?
$(a) \ B = \mu_0(H + I)$
$(b) \ B = \mu_0(H + \chi_m)$
$(c) \ \mu_r = 1 + \chi_m$
$(d) \ \chi_m = I / H$
(Here,$I =$ intensity of magnetization and $H =$ magnetising field)

$A$ bar magnet having length $5 \ cm$ and area of cross-section $4 \ cm^{2}$ has a magnetic moment of $2 \ Am^{2}$. If the magnetic susceptibility is $5 \times 10^{-6}$,the magnetic intensity will be:

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