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Pick out the temperature at which iron becomes paramagnetic?(a) 800 °C(b) 700 °C(c) 600 °C(d) 500 °CI got this question in an internship interview.Asked question is from Permanent Magnets and Electromagnets topic in chapter Magnetism and Matter of Physics – Class 12 |
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Answer» RIGHT choice is (a) 800 °C To elaborate: Iron is a ferromagnetic MATERIAL. Ferromagnetism decreases with a rise in TEMPERATURE, and above a CERTAIN temperature called “CURIE’s temperature,” ferromagnets become paramagnets. For iron, it is approximately, 800 °C. |
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