NEET 2007 Physics question
Not in JEE Advanced syllabus
Nickel shows ferromagnetic property at room temperature. If the temperature is increased beyond Curie temperature then it will show
Answer: (2)
Solution
Ferromagnetic materials have domains of aligned atomic magnetic moments. On heating, thermal agitation destroys the domain alignment, and above the Curie temperature the material becomes paramagnetic (susceptibility then follows the Curie-Weiss law $χ =
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