Physics-(general)
NEET Physics (general) Assertion Reason Question
Type: Assertion Reason-assertion-Hard-Class 11
Assertion (A): The dot product of two vectors is zero when the vectors are perpendicular. | Reason (R): The scalar product of two vectors is the product of their magnitudes and the cosine of the angle between them.
A
Both A and R are true, and R is the correct explanation of A.
B
Both A and R are true, but R is not the correct explanation of A.
C
A is true, but R is false.
D
A is false, but R is true.
Correct Answer
Option A
Detailed Explanation
The assertion is true as the dot product is zero when the angle is 90 degrees, making cos 90 = 0. The reason correctly explains this by defining the scalar product as A . B = A B cos θ.
Found an issue with this question?