Moment of inertia of a thin uniform rod rotating about the perpendicular axis passing through its centre is 
. If the same rod is bent into a ring and its moment of inertia about its diameter is 
, then the ratio 
is
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
D
: Let 
be the mass of the rod and 
be its length. Then
When the same rod is bent into the ring of radius 
, then
Its moment of inertia about its diameter is
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