Two vectors overrightarrow A and overrightarrow B are at right angles to each other, when

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3-1.Vectors

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Two vectors $\overrightarrow A $ and $\overrightarrow B $ are at right angles to each other, when

A

$\overrightarrow A + \overrightarrow B = 0$

B

$\overrightarrow A - \overrightarrow B = 0$

C

$\overrightarrow A \times \overrightarrow B = 0$

D

$\overrightarrow A \,.\,\overrightarrow B = 0$

(AIIMS-1987)

Solution

(d) $\vec A.\vec B = \,|\vec A|.|\vec B|.\cos \theta = \vec A.\vec B.\cos 90^\circ = 0$

Standard 11

Physics

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