The ratio of moment of inertia about axis of a ring to a axis of disc of same mass and radius is …………….

The ratio of moment of inertia about axis of a ring to a axis of disc

1.	The ratio of moment of inertia about axis of a ring to a axis of disc of same mass and radius is …………….
Answer» `1:1` `2:1` `4:1` `1:2` Solution :The MOMENT of inertia RING about an axis PASSING through its centre and perpendicular to its plane is `I_("ring")=MR^(2)`. Where M = mass R = RADIUS. Moment of inertia disc about on axis passing through its center and perpendicular to its plane `I_("disc")=(1)/(2)MR^(2)` `therefore (I_("ring"))/(I_("disc"))=(MR^(2))/((1)/(2)MR^(2))=2:11`