Question

The magnetization of a bar magnet of length 4 cm, cross-sectional area 1 cm2 and magnetic moment 2 SI units is ______.

Options

• 5 × 10⁵ A/m

• 5 × 10³ A/m

• 5 × 10⁵ A.m

• 5 × 10³ A.m

Answer 1

The magnetization of a bar magnet of length 4 cm, cross-sectional area 1 cm2 and magnetic moment 2 SI units is 5 × 10⁵ A/m.

Explanation:

`M_z = M/V = M/(LA)`

= `(2A.m^2)/((4 xx 10 ^-2  m)(10^-4  m^2))`

= 0.5 × 10⁶

= 5 × 10⁵ A/m