First slide

Magnetic properties of materials

Question

When a piece of ferromagnetic substances is put in a uniform magnetic field, the flux density inside it is four times the flux density away from the piece. The magnetic permeability of the material is

Easy

A

1
B

2
C

3
D

4

Solution

$M a g n e t i c P e r m e a b i l i t y = μ = \frac{B}{B_{o}} = \frac{4 B_{o}}{B_{o}} = 4$

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