Two vectors A , and B are such that A + B = A - B. Then - Vidyadip

MCQ

Two vectors $\vec A\,{\rm{ and }}\vec B$ are such that $\vec A + \vec B = \vec A - \vec B$. Then

A
$\vec A\,.\,\vec B = 0$
B
$\vec A \times \vec B = 0$
C
$\vec A = 0$
✓
$\overrightarrow B = 0$

✓

Answer

Correct option: D.

$\overrightarrow B = 0$

d
$\vec{A}+\vec{B}=\vec{A}-\vec{B}$

$(\vec{A}-\vec{A})+\vec{B}+\vec{B}=0$

$0+2\vec{B}=0$

$\vec{B}=0$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q (1 Marks)" from 3.1 vectors→3.1 vectors — all question types→Physics STD 11 Science question papers→Rajasthan Board STD 11 Science question papers→Rajasthan Board question paper generator→

Similar questions

The pressure and temperature of an ideal gas in a closed vessel are $720\, kPa$ and $40^oC$ respectively. If $\frac{1}{4}^{th}$ of the gas is released from the vessel and the temperature of the remaining gas is raised to $353^oC,$ the final pressure of the gas is ....... $kPa$

When two harmonic sound waves of close (but not equal) frequencies are heard at the same time, we hear:

The Doppler's effect is applicable for

The vertical limbs of a $U$ shaped tube are filled with a liquid of density $\rho$ upto a height $h$ on each side. The horizontal portion of the $U$ tube having length $2h$ contains a liquid of density $2\rho$ . The $U$ tube is moved horizontally with an accelerator $g/2$ parallel to the horizontal arm. The difference in heights in liquid levels in the two vertical limbs, at steady state will be

Two sound sources each emitting waves of wavelength $\lambda$ are fixed a given distance apart and an observer moves from one source to another with velocity $u$. Then number of beats heard by him per second is

A metal wire of length $'L'$ is suspended vertically from a rigid support. When a body of mass $M$ is attached to the lower end of wire, the elongation in wire is $'l'$, consider the following statements

$(I)$ the loss of gravitational potential energy of mass $M$ is $Mgl$

$(II)$ the elastic potential energy stored in the wire is $Mgl$

$(III)$ the elastic potential energy stored in wire is $\frac{1}{2}\, Mg l$

$(IV)$ heat produced is $\frac{1}{2}\, Mg l$

Correct statement are :-

In the absence of intermolecular force of attraction, the observed pressure $P$ will be

The total energy of a particle executing $S.H.M.$ is $80 \,J$. What is the potential energy when the particle is at a distance of $\frac{3}{4}$ of amplitude from the mean position..... $J$

Water rises to a height $h$ in capillary tube. If the length of capillary tube above the surface of water is made less than $h,$ then

A person driving car at a constant speed of $15\,m / s$ is approaching a vertical wall. The person notices a change of $40\,Hz$ in the frequency of his car's horn upon reflection from the wall. The frequency of horn is ............ $Hz$. (Given : Speed of sound : $330\,m / s$ )