Moment of inertia of a rod of mass M and length L about an axis p… | JEE Main 2025 Physics PYQ

MCQEasyJEE Main 2025 · 2 April, Shift 1Moment of Inertia & Radius of Gyration

Moment of inertia of a rod of mass $M$ and length $L$ about an axis passing through its center and normal to its length is $\alpha$ . Now the rod is cut into two equal parts and these parts are joined symmetrically to form a cross shape. Moment of inertia of cross about an axis passing through its center and normal to the plane containing cross is:

A
$\alpha$
B
$\frac{\alpha}{4}$
C
$\frac{\alpha}{8}$
D
$\frac{\alpha}{2}$

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