JEE MainPhysicsMagnetic Properties of Matter
The absolute magnetic permeability of a material is 4 10⁻⁴ Wb/A-m. If the permeability of free space is ₀ = 4 10⁻⁷ Wb/A-m, the magnetic susceptibility of the material is:
Options
- A999
- B1000
- C1001
- D10⁻³
Correct answer
A. 999
Step-by-step solution
The relative permeability _r of the material is given by the ratio of its absolute permeability to the permeability of free space: _r = ₀ _r = 4 10⁻⁴ 4 10⁻⁷ = 1000 The relation between relative permeability and magnetic susceptibility is: _r = 1 + = _r - 1 = 1000 - 1 = 999 Answer: 999