CBSE Class 12-science Answered
A nickel bar magnet is heated to 500oC and then cooled in free space, which is devoid of any magnetic field. Will the bar retain magnetism?
Asked by Topperlearning User | 01 Jun, 2015, 01:35: PM
Expert Answer
No, the bar will not retain magnetism. This is because at Curie temperature (358oC), nickel becomes paramagnetic and loses its magnetism on heating further. When cooled in a magnetic field free space, the bar does not retain its magnetism.
Answered by | 01 Jun, 2015, 03:35: PM
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