The magnetic susceptibility of a paramagnetic material at -80^0C is 0.0085, then what is its value at -180^0C?(a) 0.015(b) 0.016(c) 0.017(d) 0.018I got this question in homework.The above asked question is from Magnetic Properties of Materials in division Magnetism and Matter of Physics – Class 12

The magnetic susceptibility of a paramagnetic material at -80^0C is 0.

1.	The magnetic susceptibility of a paramagnetic material at -80^0C is 0.0085, then what is its value at -180^0C?(a) 0.015(b) 0.016(c) 0.017(d) 0.018I got this question in homework.The above asked question is from Magnetic Properties of Materials in division Magnetism and Matter of Physics – Class 12
Answer» The correct choice is (C) 0.017 To explain: Given: χm1 = 0.0085; T1 = -80^0 C = -80 + 273 = 193 K; T2 = -180^0 C = -180 + 273 = 93 K χm ∝ \(\frac {1}{T}\) \(\frac {\chi_{m2}}{\chi_{m1}} \, = \, \frac {T_1}{T_2}\) \(\frac {\chi_{m2}}{0.0085} \, = \, \frac {193}{93}\) χm2 = \(\frac {193 \, \times \, 0.0085}{93}\) χm2 = 0.017

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