Download App

Motion in Two Dimension — JEE physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceJEE physicsMotion in Two Dimension1 Mark
MCQ
The average acceleration vector for a particle having a uniform circular motion is
  • A
    A constant vector of magnitude $\frac{v^2}{r}$
  • B
    A vector of magnitude $\frac{v^2}{r}$ directed normal to the plane of the given uniform circular motion
  • C
    Equal to the instantaneous acceleration vector at the start of the motion
  • ✓
    A null vector
✓

Answer

Correct option: D.
A null vector
(d) In complete revolution change in velocity becomes zero so average acceleration will be zero.

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 "MCQ" from Motion in Two Dimension→Motion in Two Dimension — all question types→JEE physics STD 12 Science question papers→CBSE Board STD 12 Science question papers→CBSE Board question paper generator→

Similar questions

A Carnot engine working between $300 \mathrm{~K}$ and $600 \mathrm{~K}$ has work output of $800 \mathrm{~J}$ per cycle. What is amount of heat energy supplied to the engine from source per cycle
→
Which one of the following phenomena is not explained by Huygen's construction of wavefront
→
When a point source of monochromatic light is at a distance of $0.2 m$ from a photoelectric cell, the cut$-$off voltage and the saturation current are $0.6 \mathrm{volt}$ and $18 \mathrm{~mA}$ respectively. If the same source is placed $0.6 \mathrm{~m}$ away from the photoelectric cell, then
→
If a person with a spring balance and a body hanging from it goes up and up in an aeroplane, then the reading of the weight of the body as indicated by the spring balance will
→
The lowest frequency of light that will cause the emission of photoelectrons from the surface of a metal (for which work function is $1.65 \mathrm{eV}$ ) will be
→
In P-type semiconductor, there is
→
The pressure of air in a soap bubble of $0.7 \mathrm{~cm}$ diameter is $8 \mathrm{~mm}$ of water above the pressure outside. The surface tension of the soap solution is
→
A car travels half the distance with constant velocity of $40 kmph$ and the remaining half with a constant velocity of $60 kmph$. The average velocity of the car in $k m p h$ is
→
A compound microscope is used to enlarge an object kept at a distance $0.03 \mathrm{~m}$ from it's objective which consists of several convex lenses in contact and has focal length $0.02 \mathrm{~m}$. If a lens of focal length $0.1 \mathrm{~m}$ is removed from the objective, then by what distance the eyepiece of the microscope must be moved to refocus the image
→
Shown in the figure is a circular loop of radius $r$ and resistance $R$. A variable magnetic field of induction $B=B_0 e^{-t}$ is established inside the coil. If the key $(K)$ is closed, the electrical power developed right after closing the switch is equal toImage
→