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Relative permittivity and permeability of a material εr and μr respectively. Which of the following values of these quantities are allowed for a diamagnetic material?

1. εr = 0.5, μr = 1.5
2. εr = 1.5, μr = 0.5
3. εr = 0.5, μr = 0.5
4. εr = 1.5, μr = 1.5

Correct answer: εr = 1.5, μr = 0.5

Solution

Diamagnetic materials have a relative permeability (μr) less than 1, indicating they are repelled by magnetic fields, while their relative permittivity (εr) can be greater than 1, reflecting their ability to store electric energy. Therefore, the combination of εr = 1.5 and μr = 0.5 is consistent with the properties of a diamagnetic material.

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