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IIT-JEE 2006
MCQ (Single Correct Answer)
+3
-1

A solid sphere of radius $R$ has moment of inertia $I$ about its geometrical axis. If it is melted into a disc of radius $r$ and thickness $t$. If its moment of inertia about the tangential axis (which is perpendicular to plane of the disc), is also equal to $I$, then the value of $r$ is equal to

IIT-JEE 2006 Physics - Rotational Motion Question 2 English
A

$\frac{2}{\sqrt{15}} R$

B

$\frac{2}{\sqrt{5}} R$

C

$\frac{3}{\sqrt{15}} R$

D

$\frac{\sqrt{3}}{\sqrt{15}} R$

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