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A circular disc is to be made by using e...

A circular disc is to be made by using equal masses of aluminium and iron. To get maximum moment of inertia, about its geometrical axis, it should be so prepared that

A

Aluminium is at the interior and the iron surrounding it

B

Iron is at the interior and the aluminium surrounding it

C

Aluminium and iron are used in alternate layers

D

Aluminium and iron discs should be kept one above the other

Text Solution

Verified by Experts

The correct Answer is:
A
M.I. depends upon the distribution of mass. `rho_("Iron")gt rho_("Al")`.
`therefore" Al inside"-"Iron outside"`
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