Concepts Of Physics MCQ Edition [Volume 2]PhysicsMagnetic Properties of Matter
At saturation, the susceptibility of annealed iron is 5500 . Determine the permeability of annealed iron at saturation.
Options
- A5.5 10⁻³ T m A ⁻¹
- B1.4 10⁻³ T m A ⁻¹
- C6.9 10⁻³ T m A ⁻¹
- D6.9 10⁻⁵ T m A ⁻¹
Correct answer
C. 6.9 10⁻³ T m A ⁻¹
Step-by-step solution
Given magnetic susceptibility, = 5500 The relative permeability is given by: _r = 1 + _r = 1 + 5500 = 5501 The permeability of the material is: = _r ₀ Substituting the values: = 5501 4 10⁻⁷ = 5501 4 3.14 10⁻⁷ 6.9 10⁻³ T m A ⁻¹