MCQ
How does the magnetic susceptibility $\chi$ of a paramagnetic material change with absolute temperature T?
- A$\chi \propto e^T$
- B$\chi \propto e^T$
- C$\chi=$ constant
- D$\chi \propto T^{-1}$
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$1.$ A sphere $2.$ Cylindrical
$3.$ Pear $4.$ Lightning conductor
are mounted on insulating stands and charged. The one which is best suited to retain the charges for a longer time is