Answer & explanation
Correct answer: option 1
Frequency is inversely propotional to $ f \propto \frac{1}{\sqrt I}$
$\Rightarrow \text{On quadrupling the moment of inertia of a magnet, it's frequency of oscillation will be half.}$
Correct answer: option 1
Frequency is inversely propotional to $ f \propto \frac{1}{\sqrt I}$
$\Rightarrow \text{On quadrupling the moment of inertia of a magnet, it's frequency of oscillation will be half.}$