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3-1.Vectors
easy
What is the angle between $(\overrightarrow P + \overrightarrow Q )$ and $(\overrightarrow P \times \overrightarrow Q )$
A
0
B
$\frac{\pi }{2}$
C
$\frac{\pi }{4}$
D
$\pi $
Solution
(b)Vector$(\vec P + \vec Q)$ lies in a plane and vector $(\vec P \times \vec Q)$ is perpendicular to this plane i.e. the angle between given vectors is $\frac{\pi }{2}$.
Standard 11
Physics
Similar Questions
If $\theta$ is the angle between two vectors $A$ and $B$, then match the following two columns.
| colum $I$ | colum $II$ |
| $(A)$ $A \cdot B =| A \times B |$ | $(p)$ $\theta=90^{\circ}$ |
| $(B)$ $A \cdot B = B ^2$ | $(q)$ $\theta=0^{\circ}$ or $180^{\circ}$ |
| $(C)$ $|A+B|=|A-B|$ | $(r)$ $A=B$ |
| $(D)$ $|A \times B|=A B$ | $(s)$ None |
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