1. Tardigrade
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  3. Physics
  4. Assertion: The first derivative of a vector of constant magnitude (either zero or a nonzero) is perpendicular to the vector itself. Reason: Scalar product of two vectors obeys commutative law.

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Q. Assertion : The first derivative of a vector of constant magnitude (either zero or a nonzero) is perpendicular to the vector itself.
Reason : Scalar product of two vectors obeys commutative law.

AIIMSAIIMS 2018Work, Energy and Power

Solution:

Correct answer is (b) If both assertion and reason are true but reason is not the correct explanation of assertion