First slide

Magnetisation and magnetic intensity

Question

The mass of an iron rod is 80 gm and its magnetic moment is 10 Am². If the density of iron is 8 gm/c.c. Then the value of intensity of magnetization will be

Moderate

A

10⁶ A/m
B

10⁴ A/m
C

10² A/m
D

10 A/m

Solution

$\begin{array}{rcl} V & = & \frac{m}{ρ} = \frac{80}{8} = 10 cc \\ I & = & \frac{M}{V} = \frac{10}{10 x 10^{- 6}} = 10^{6} A / m \end{array}$

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