Assertion : Angle and angular displacement are dimensionless quantities.
Reason : Angle is equal to arc length divided by radius.

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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 both assertion and reason are false.

answer is A.

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Detailed Solution

Angle or angular displacement

$= \frac{A r c l e n g t h}{R a d i u s} = \frac{[L]}{[L]}$ . It is a dimensionless quantity.

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