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The dot product of two perpendicular non-zero vectors is
Azero
Bone
Cthe product of their magnitudes
Dnegative
Answer & Solution
Correct answer: A. zero
1. a · b = |a| |b| cos θ.
2. If a and b are perpendicular, θ = 90° so cos θ = 0.
3. Hence a · b = 0 for perpendicular vectors.
_Source: Maharashtra Balbharati Std XII Mathematics Part 1, Ch 5 "Vectors" §5.4_
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