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The susceptibility of a paramagnetic material is 99. The permeability of the material in Wb/A-m, is [Permeability of free space μ0 = 4π × 10⁻⁷ Wb/A-m]

1. 4π × 10⁻⁷
2. 4π × 10⁻⁴
3. 4π × 10⁻⁵
4. 4π × 10⁻⁶

Correct answer: 4π × 10⁻⁵

Solution

The permeability of a paramagnetic material can be calculated using the formula μ = μ0(1 + χ), where χ is the susceptibility. Given that the susceptibility is 99, the calculation yields a permeability of approximately 4π × 10⁻⁵ Wb/A-m.

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