JEE Main 2025 (2 Apr, Shift 1) Physics Q32: Moment of…

Question

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 plane containing cross is :

(1) $\alpha$
(2) $\alpha/2$
(3) $\alpha/8$
(4) $\alpha/4$ Official answer

Official answer

Option 4

NTA final key.

Accepted Answer

Option 4: $\alpha/4$

Answer

$\alpha$

Answer

$\alpha/2$

Answer

$\alpha/8$

Answer

$\alpha/4$

JEE Main 2 April 2025, Shift 1, Physics Q32

Same idea in other shifts