Perpendicular axis theorem can be applied for which of the following bodies?

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Editor">Editor Staff asked 1 year ago

Perpendicular axis theorem can be applied for which of the following bodies?
 
(a) Ring having radius R & negligible cross section
 
(b) Disc of radius R and thickness t
 
(c) Cylinder of radius R and height h
 
(d) A cube of side ‘a’
 
This question was addressed to me in an online quiz.
 
My question is from Theorems of Perpendicular and Parallel Axes in division System of Particles and Rotational Motion of Physics – Class 11
Select the correct answer from above options 
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Editor">Editor Staff answered 1 year ago

Correct option is (a) Ring having radius R & negligible cross section
 
For explanation: Perpendicular axis theorem can only be applied to planar bodies. From the given options only the ring is planar.

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