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NEET Physics · Medium

Basic Mathematics & Vectors: Dot Product MCQ

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Dot ProductMediumQuestion 5116

Question

The dot product A·B of two vectors A and B inclined at angle θ is:
  1. A
    AB sinθ
  2. B
    AB cosθ
    Correct
  3. C
    AB tanθ
  4. D
    A²B²cosθ

Correct answer

AB cosθ

Explanation

A·B = AB cosθ. The dot product gives a scalar. It is maximum when θ = 0° and zero when θ = 90°.

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