Moment of Inertia - NEET Physics Questions
Question 1:

A wire of mass m and length L is bent in the form of a circular ring. The moment of inertia of the ring about its axis is

1. mL²
2. mL²/ 4π²
3. mL²/ 2π²
4. mL²/ 8π²
View Answer

Let the radius of Ring formed is R. Then 

2πR= L ⇒ R = L/2π

Moment of Interia= m (L/2π)²= mL²/ 4π²