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Question
A magnet of magnetic moment 3Am2 weighs 75 g. The density of the material of the magnet is 7500 kg/m3. what is magnetization?
Solution
Given:
mnet = 3 Am2
mass = 75 g = 75 × 10-3 kg
Density, d = 7500 kg/m3
To find: Magnetization (M)
Formulae:
- Density = `"Mass"/"Volume"`
- M = `"m"_"net"/"V"`
Calculation:
From formula (i) and (ii),
M = `"m"_"net" xx "density"/"mass"`
= `3 xx 7500/(75 xx 10^-3)`
= 3 × 105 A/m
The magnetization is 3 × 105 A/m.
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