question_answer

Four point masses, each of value m, are placed at the corners of a square ABCD of side 1. The moment of inertia of this system about an axis passing through A and parallel to BD is                                  [AIEEE 2006]

A)   \[2m{{l}^{2}}\]        

B)        \[\sqrt{3}\,m{{l}^{2}}\]         

C)   \[3\,m{{l}^{2}}\]      

D)        \[\,m{{l}^{2}}\]

Correct Answer: C

Solution :

[c] The situation is shown in figure.