wiz-icon
MyQuestionIcon
MyQuestionIcon
4
You visited us 4 times! Enjoying our articles? Unlock Full Access!
Question

Two circular discs A and B are of equal masses and thickness but made of metals with densities dA and dB(dA>dB). If their moments of inertia about an axis passing through centres and normal to the circular faces be IA and IB, then

A
IA=IB
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
IA>IB
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
IA<IB
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
D
IA>=<IB
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is C IA<IB
Moment of inertia of circular disc about an axis passing through centre and normal to the circular face
I=12MR2=12M(Mπtρ) [As M=Vρ=πR2tρ R2=Mπtρ]
I=M22πtρ or I1ρ If mass and thickness are constant.
So, in the problem IAIB=dBdA IA<IB [AsdA>dB]

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Moment of Inertia of Solid Bodies
PHYSICS
Watch in App
Join BYJU'S Learning Program
CrossIcon