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When does a paramagnetic material become diamagnetic material?

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When does a paramagnetic material become diamagnetic material?

(a) At critical temperature

(b) Above critical temperature

(c) Below critical temperature

(d) Never

The question was posed to me in an online interview.

Question is from Classification of Magnetic Materials in section Magnetic Properties of Materials of Engineering Physics II

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Right answer is (c) Below critical temperature

The explanation: Critical temperature is the temperature at which properties like magnetism changes. When the temperature is less than the critical temperature, the diamagnetic material becomes a normal magnet.

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