NEET Physics (general) MCQ Question
Which of the following statements about the scalar product of two vectors A and B is correct?
The scalar product A . B is a vector quantity.
The scalar product A . B is equal to the product of the magnitudes of A and B multiplied by the cosine of the angle between them.
The scalar product A . B is zero if A and B are parallel.
The scalar product is defined only for perpendicular vectors.
Correct Answer
Detailed Explanation
The scalar product A . B is defined as A . B = |A| |B| cos θ, where θ is the angle between the vectors, making option B correct. Option A is incorrect because the scalar product is a scalar quantity, not a vector. Option C is incorrect as the scalar product is zero if A and B are perpendicular, not parallel. Option D is incorrect since the scalar product can be calculated for any angle between two vectors.
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