Two vector A and B have equal magnitudes. Then vector mathop Alimits^ to + mathop Blimits^ to is per

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3-1.Vectors

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Two vector $A$ and $B$ have equal magnitudes. Then the vector $\mathop A\limits^ \to + \mathop B\limits^ \to $ is perpendicular to

A

$\mathop A\limits^ \to \times \mathop B\limits^ \to $

B

$\mathop A\limits^ \to - \mathop B\limits^ \to $

C

$3\mathop A\limits^ \to \times 3\mathop B\limits^ \to $

D

All of these

Solution

(a) $\vec A \times \vec B$ is a vector perpendicular to plane $\vec A + \vec B$ and hence perpendicular to $\vec A + \vec B$.

Standard 11

Physics

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