Physics System of Particles Rotational Motion JEE Main 2025 ( Rotational Motion ) MCQ (Single Correct)

The moment of inertia of a circular ring of mass M and diameter r about a tangential axis lying in the plane of the ring is:

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B

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The correct answer is:
A

The moment of inertia of a circular ring with mass and diameter about a tangential axis lying in the plane of the ring is calculated as follows:

Given the diameter of the ring, the radius is .

The formula for the moment of inertia about a tangential axis in the plane of the ring is:

Substitute the value of into the equation:

Therefore, the moment of inertia of the ring about the specified axis is .

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