If A = 5i + 2j and B = ai + 3j are perpendicular to each other, the value of 'a' is (a) -6/5 (b) 6/5 (c) 4/5 (d) -4/5

Answer: (a). A · B = 0 ⇒ 5a + 6 = 0 a = -6/5, answer (a).

If A = 5i + 2j and B = ai + 3j are perpendicular to each other, the… | MHT CET 2026 (12 May, Shift 1)

Q4MHT CET 2026 · 12 MAY · SHIFT 1Easy

Scalar (Dot) Product

If $\vec{A} = 5\hat{i} + 2\hat{j}$ and $\vec{B} = a\hat{i} + 3\hat{j}$ are perpendicular to each other, the value of 'a' is

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Answer: (a)

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