Physics-(general)
NEET Physics (general) MCQ Question
Type: MCQ-conceptual-Hard-Class 11
Which of the following combinations about scalar products is correct?
A
A . B is a scalar quantity and A . B = B . A.
B
A . B has a direction and A . B = A (B cos θ).
C
A . B is only defined for perpendicular vectors and follows the associative law.
D
A . B = A (B cos θ) and A . B depends on the magnitudes of A and B only.
Correct Answer
Option A
Detailed Explanation
The scalar product A . B is indeed defined as A . B = A B cos θ, making it a scalar quantity. It also follows the commutative law, A . B = B . A, as stated in the provided context.
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