Q.

Which of the following is incorrect

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a

Lesser area of hysteresis loop indicates lesser loss of heat

b

Hysteresis loop is not shown by diamagnetic substance

c

Curie temperature is the temperature above which ferromagnetic material becomes diamagnetic material

d

Water, NaCl and lead all are the examples of diamagnetic substances

answer is C.

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Detailed Solution

Above curie temperature ferromagnetic substances behaves as paramagnetic substances
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