Class 11

3-1.Vectors question bank (Physics)

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Q1.

Vector $\overrightarrow{A}$ makes equal angles with $x, y,$ and $z$ axes. The value of its components (in terms of the magnitude of $\overrightarrow{A}$) will be:

(A)

$\frac{A}{\sqrt{3}}$

(B)

$\frac{A}{\sqrt{2}}$

(C)

$\sqrt{3}A$

(D)

$\frac{\sqrt{3}}{A}$

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Q2.

If a vector $\overrightarrow{P}$ makes angles $\alpha, \beta,$ and $\gamma$ with the $X, Y,$ and $Z$ axes respectively,then $\sin^2 \alpha + \sin^2 \beta + \sin^2 \gamma =$

(A)

$0$

(B)

$1$

(C)

$2$

(D)

$3$

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