NTA Abhyas JEE Main2020PhysicsMagnetic Properties of MatterPractice
The magnetic susceptibility of a material of a rod is 499 . The absolute permeability of vacuum is 4 π × 10 - 7 H m - 1 . The absolute permeability of the material of a rod is
Options
- Aπ × 10 - 4 H m - 1
- B2 π × 10 - 4 H m - 1
- C3 π × 10 - 4 H m - 1
- D4 π × 10 - 4 H m - 1
Correct answer
B. 2 π × 10 - 4 H m - 1
Step-by-step solution
Absolute permeability of material of rod μ = μ r μ 0 = 1 + X m μ 0 ∴ μ = 1 + 499 × 4 π × 10 - 7 = 2 π × 10 - 4 H m - 1