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Physics · SYSTEMS OF PARTICLES AND ROTATIONAL MOTION

हिन्दी

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): The axis of rotation of an oscillating table fan changes its direction periodically in a horizontal plane. Reason (R): For a rigid body rotating about a fixed axis, every particle of the body moves in a circular path perpendicular to the axis. In the light of the above statements, choose the correct answer from the options given below:

  1. Both (A) and (R) are true and (R) is the correct explanation of (A).
  2. Both (A) and (R) are true but (R) is NOT the correct explanation of (A).
  3. (A) is true but (R) is false.
  4. (A) is false but (R) is true.

Correct answer · Option 2

Both (A) and (R) are true but (R) is NOT the correct explanation of (A).

Explanation

Both statements are factually correct statements from NCERT, but the definition of rotation about a fixed axis does not explain why an oscillating fan's axis oscillates.
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