If = and = , then find the value of n so that . | CGP Edu

Physics Vectors Basic Mathematics MCQ (Single Correct)

If = and = , then find the value of n so that .

A

n = 2

B

n = – 1

C

n + 1

D

n = – 2

Text Solution

Verified by Experts

The correct answer is:

Dot product of two mutually perpendicular vectros is zero = 0

∴ = 0 ⇒ (4×2) + (n × 3) + (–2 × 1) = 0

⇒ 3n = – 6 ⇒ n =–2

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