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Linnea Asked :

28-05-2021 Dot and Cross Product

Q. When two vectors are perpendicular, their

A. Cross product is zero
B. Dot product is zero
C. Both are zero
D. Both are not necessarily zero

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Dapzoi Verified
Commented on 2021-05-28 15:52:19 (IST)
Answer: A

Explanation: Dot product of two perpendicular vectors is given by A.B = |a||b|cos 90, which is zero. Thus, dot product is zero and vectors are perpendicular.