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Physics · PYQ NEET UG 2018

हिन्दी

A solid sphere is rotating freely about its symmetry axis in free space. The radius of the sphere is increased keeping its mass same. Which of the following physical quantities would remain constant for the sphere?

  1. Angular velocity
  2. Moment of inertia
  3. Rotational kinetic energy
  4. Angular momentum

Correct answer · Option 4

Angular momentum

Explanation

Due to conservation of angular momentum (\( L = I\omega = \text{constant} \)) in the absence of external torque, angular momentum remains constant.

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