Q. One circular ring and one circular disc, both are having the same mass and radius. The ratio of their moments of inertia about the axes passing through their centres and perpendicular to their planes, will be
A) 1 :1
B) 2 :1
C) 1 :2
D) 4 :1
Explanation
(b) $\frac{I_{Ring}}{I_{Disc}} = \frac{MR^{2}}{1/2MR^{2}} = 2:1$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.