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Question 5144
NEET Physics · Hard

Basic Mathematics & Vectors: Vector Algebra MCQ

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Vector AlgebraHardQuestion 5144

Question

The angle between vectors A = î + ĵ and B = î − ĵ is:
  1. A
    0°
  2. B
    45°
  3. C
    90°
    Correct
  4. D
    180°

Correct answer

90°

Explanation

A·B = (1)(1) + (1)(−1) = 0. Since dot product is zero, the vectors are perpendicular: θ = 90°.

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