A sample of cast iron exhibits a magnetic field $B=0.5 T,$ when intensity of magnetizing field $(H)$ is $10 \frac{\mathrm{A}}{\mathrm{m}}.$ Relative permeability of iron is

NEET UG PHYSICS MCQ: MAGNETISM AND MATTER

1 Hard

1 of 1

Application +4 | -1

A sample of cast iron exhibits a magnetic field

B=0.5 T,

when intensity of magnetizing field

(H)

10 \frac{\mathrm{A}}{\mathrm{m}}.

Relative permeability of iron is 

View answer and explanation

Correct option: C

\frac{125000}{\pi}

Option C (

\frac{125000}{\pi}

) is correct because the relative permeability is calculated using the formula

\mu_r = \frac{B}{\mu_0 H}

Practice All Chapter MCQs →

\vec A = 2\vec i - 3\vec j + 6\vec k\,{m^2}

\vec B = - 3\vec i + \vec j + 2\vec k\,\left( {Wb/{m^2}} \right)

250\;joule

10\;kg

50\;Hz

7.5\;gm/c{m^3}

M

B