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Q.

Directions : These questions consists of two statements each printed as Assertion and Reason. Whileanswering these questions, you are required to choose any one of the following four responses.Assertion : If a particle moves with a constant velocity, then angular momentum of this particleabout any point remains constant.Reason : Angular momentum has the units of Planck's constant.

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a

If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.

b

If both Assertion and Reason are correct but Reason is not  the correct explanation of Assertion.

c

If Assertion is correct but Reason is incorrect.

d

If Assertion is incorrect but Reason is correct.

answer is B.

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Detailed Solution

L=mvrsinθ or mvr⊥In case of constant velocity, m, v and  r⊥ all are constants.Therefore, angular momentum is constant.Further, L=nh2π  (in Bohr's theory).Therefore, L  and h have same units.
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Directions : These questions consists of two statements each printed as Assertion and Reason. Whileanswering these questions, you are required to choose any one of the following four responses.Assertion : If a particle moves with a constant velocity, then angular momentum of this particleabout any point remains constant.Reason : Angular momentum has the units of Planck's constant.