Physics-(general)
NEET Physics (general) MCQ Question
Type: MCQ-conceptual-Medium-Class 11
Which of the following statements about the scalar product of two vectors A and B is correct?
A
The scalar product A . B is a scalar quantity and follows the commutative law.
B
A . B is a vector quantity that can have direction.
C
If A and B are perpendicular, then A . B is equal to the sum of their magnitudes.
D
The scalar product A . B is zero if A and B are not parallel.
Correct Answer
Option A
Detailed Explanation
The scalar product A . B is a scalar quantity and indeed follows the commutative law, as stated in the context: 'A . B = B . A'. This aligns with the definition provided that A . B is defined as A B cos θ.
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