Q. The critical temperature above which ferromagnetic materials lose their magnetic property is called
A. Kelvin Point
B. Curie Point
C. Recrystallizaion point
D. Celsius Point
Answer: Curie Point
Below the Curie temperature, the atoms are aligned and parallel, causing spontaneous magnetism; the material is ferromagnetic. Above the Curie temperature, the material is paramagnetic, as the atoms lose their ordered magnetic moments when the material undergoes a phase transition.
A. Kelvin Point
B. Curie Point
C. Recrystallizaion point
D. Celsius Point
Answer: Curie Point
Curie Point was discovered by Pierre Curie that beyond a certain temperature ferromagnetic materials lose their magnetic properties, i.e. the ability to have a net magnetization in the absence of an external magnetic field. This so-called critical temperature (or the Curie point) is different for each material.
Materials are only ferromagnetic below their corresponding Curie temperatures. Ferromagnetic materials are magnetic in the absence of an applied magnetic field.
ReplyDeleteBelow the Curie temperature, the atoms are aligned and parallel, causing spontaneous magnetism; the material is ferromagnetic. Above the Curie temperature the material is paramagnetic, as the atoms lose their ordered magnetic moments when the material undergoes a phase transition.
भौतिकी और पदार्थ विज्ञान में क्यूरी ताप (Curie temperature (Tc)) या क्यूरी बिन्दु (Curie point) वह ताप है जिस पर उस पदार्थ का स्थायी चुम्बकत्व समाप्त हो जाता है और केवल प्रेरित चुम्बकत्व ही शेष रहता है।
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