A circular disc A of radius r is made from an iron plate of thickness t and another circular disc B of radius 4 r is made from an iron plate of thickness t /4. The relation between the moments of inertia 
and 
is
A
B
C
D
Depends on the actual values of t and r
Text Solution
Verified by ExpertsThe correct answer is:
C
Moment of inertia of circular disc of radius 
:
Mass 
Volume 
Density
Volume of disc 
Here, 
is the thickness of the disc.
As density is same for both the rods, we have
Moment of inertia,
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