In this question, a statement of assertion is followed by …

Physics System of Particles Rotational Motion Assertion & Reason MCQ (Single Correct)

In this question, a statement of assertion is followed by a statement of reason . Mark the correct choice as:

Assertion: Two circular discs of equal masses and thickness made of different material, will have different moment of inertia about their central axes of rotation.
Reason: Moment of inertia depends upon the mass of the body only.

If both assertion and reason are true and reason is the correct explanation of assertion.

If both assertion and reason are true but reason is not the correct explanation of assertion.

If assertion is true but reason is false.

If assertion is false but reason is true.

Text Solution

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The correct answer is:

: As , i.e. The moment of inertia of a body not only depends upon the mass but also

depend upon the distribution of mass with respect to the axis of rotation. The disc made of less dense material will have larger moment of inertia because it will have greater surface area i.e. particles are at a greater distance from the axis of rotation.

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