Question

Both magnetization and magnetic intensity have the same unit.

(a) True

(b) False

The question was asked in quiz.

I would like to ask this question from Magnetisation and Magnetic Intensity topic in portion Magnetism and Matter of Physics – Class 12

Answer 1

Right choice is (a) True

The best explanation: Both magnetization and magnetic intensity have the same unit ➔ A/m.

Magnetic intensity (H) = \(\frac {B_o}{\mu_o}\)                                                                                                                                                             B = \(\frac {current}{length}\) (ampere circuital law) ➔ unit of B0 = \(\frac {A}{m}\); μ0 is dimensionless as it is a constant. Therefore, the unit of H is the same as B0.

Magnetization (I) = \(\frac {M}{V}\)                                                                                                                                                    I = \(\frac {Magnetic \, moment}{Volume}\) ➔ Unit of magnetic moment = Am^2; Unit of volume = m^3; I = \(\frac {Am^2}{m^3} = \frac {A}{m}\)

Thus, the units of magnetization and magnetic intensity is the same.