When temperature of a ferromagnetic material is increased by 20%, what is the percentage change in it's magnetic susceptibility?
Answer & explanation
Correct answer: option 1
Magnetic Succeptibility $ X_i = \frac{C}{T}$
After changing the temperature it becomes $ X_f = \frac{C}{1.2T}$
$\% Change = \frac{X_i - X_f}{X_i} \times 100 = \frac{1}{6} \times 100\% = 16.67\%$