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Questions  >>  CBSE XII  >>  Physics  >>  Magnetism and matter
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Q)

The susceptibility of magnetism at book is $ 1.2 \times 10^{-5}$ At what temperature will the susceptibility be equal to $1.44 \times 10^5?$

$\begin{array}{1 1} 200\;K \\ 150\;K \\ 250\;K \\ 100\;K \end{array} $

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A)
$\psi=\large\frac{c}{T} \large\frac{\psi _m}{\psi' m}$
$\quad= \large\frac{T'} {T}$
$T'= \large\frac{\psi _m}{\psi ' _m}$$\times T$
$\quad= \large\frac{1.2 \times 10^{-5}}{1.44 \times 10^{-5}}$$\times 300$
$\quad= 250\;k$
Answer : $ 250\;K $
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