Question

Moment of inertia of a uniform circular disc about a diameter is $I$. Its moment of in axis perpendicular to its plane and passing through a point on its rim will be:

• A. $5I$
• B. $6I$
• C. $3I$
• D. $4I$

Answer 1

The correct option is C $3I$

$I=\frac{m{r}^2}{2}$

$I^{\prime }=I=m{r}^2=3I$