Question

Moment of inertia of an ellipse shaped wire of mass ‘m’, semimajor axis ‘a’ about an axis passing through the centre and perpendicular to the plane of wire can be:

(A) ma² 

(B) 1.2 ma² 

(C) 1.4 ma² 

(D) 0.6 ma² 

Answer 1

Correct option (D) 0.6 ma²

Explanation:

Moment of inertia of the ellipse should be less than that of a circular ring of radius ‘a’.