Home Physics System of Particles Rotational Motion Assertion & Reason In this question, a statement of assertion …
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: The angular velocity of a planets orbiting around the sun increases when they are nearest to the sun.
Reason: The angular momentum of body is proportional to angular velocity.

A
If both assertion and reason are true and reason is the correct explanation of assertion.
B
If both assertion and reason are true but reason is not the correct explanation of assertion.
C
If assertion is true but reason is false.
D
If assertion is false but reason is true.

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The correct answer is:
B

: According to conservation of angular momentum,

As the planet comes near to sun, the moment of inertia decreases. Hence to conserve the angular momentum, angular velocity increases.

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