Q. Moment of inertia of a ring of mass $m = 3\ gm$ and radius $r = 1\ cm$ about an axis passing through its edge and parallel to its natural axis is
A) $10\ g$-$cm^{2}$
B) $100\ g$-$cm^{2}$
C) $6\ g$-$cm^{2}$
D) $1\ g$-$cm^{2}$
Explanation
(c) $I = 2MR^{2} = 2 \times 3 \times (1)^{2} = 6g - cm^{2}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.