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Q.

The susceptibility of a paramagnetic substance at a temperature 270C is  2×10−5. The substance is cooled so that its susceptibility becomes  3×10−5. The change in the temperature of the substance is

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a

−173∘C

b

200 K

c

100∘C

d

200∘C

answer is A.

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Detailed Solution

ΧΧ'=T'T ⇒300-∆T300=23 ⇒∆T=100

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