Question

Pick out the unit of magnetic permeability.

(a) TmA

(b) \(\frac {Tm}{A}\)

(c) \(\frac {T}{mA}\)

(d) \(\frac {Am}{T}\)

This question was addressed to me during an online interview.

My query is from Magnetic Properties of Materials topic in division Magnetism and Matter of Physics – Class 12

Answer 1

Right choice is (b) \(\frac {Tm}{A}\)

The explanation: Magnetic permeability (μ) of a magnetic substance is defined as the ratio of its magnetic induction (B) to the magnetic intensity (H). The expression for magnetic permeability is given as:

μ=\(\frac {B}{H}\)

Magnetic permeability is the ability of a magnetic substances to permit magnetic field lines to pass through it. The SI unit for this quantity is \(\frac {Tm}{A}\).