MCQ
Which of the following has unit but no dimension?
- AAngle.
- BStrain.
- CRelative velocity.
- DRelative density.
✓
Answer
- Angle.
Explanation:
Angle has unit of radian but has no dimensions because,
$\theta=\frac{\text{l}}{\text{r}}$
i.e., it is the ratio of two quantities of same dimensions.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
The rope shown at an instant is carrying a wave travelling towards right, created by a source vibrating at a frequency $n$. Consider the following statements
→$I.$ The speed of the wave is $4n \times ab$
$II.$ The medium at $a$ will be in the same phase as $d$ after $\frac{4}{{3n}}s$
$III.$ The phase difference between $b$ and $e$ is $\frac{{3\pi }}{2}$
Which of these statements are correct
Moment of inertia of a dise of mass $M$ and radius ' $R$ ' about any of its diameter is $\frac{ MR ^2}{4}$. The moment of inertia of this disc about an axis normal to the disc and passing through a point on its edge will be, $\frac{ x }{2} MR ^2$. The value of $x$ is $..........$.
→A flywheel is making $\frac{3000}{\pi}$ revolutions per minute about its axis. If the moment of inertia of the flywheel about that axis is $400\, kgm^2$, its rotational kinetic energy is
→A block of mass ' $m$ ' (as shown in figure) moving with kinetic energy $E$ compresses a spring through a distance $25\,cm$ when, its speed is halved. The value of spring constant of used spring will be $nE\; Nm ^{-1}$ for $n=$
→A body of mass $10\, kg$ is dropped to the ground from a height of $10\, metres$. The work done by the gravitational force is ............. $\mathrm{J}$ $(g = 9.8\,m/{\sec ^2})$
→The following phenomenon cannot be observed for sound waves
A ball is projected from ground with a speed of $20\,m / s$ at an angle of $45^{\circ}$ with horizontal. There is a wall of $25\,m$ height at a distance of $10\,m$ from the projection point. The ball will hit the wall at a height of $.........\,m$
→The temperature at which the vapour pressure of a liquid becomes equals to the external (atmospheric) pressure is its
Average density of the earth
$A$ uniform cube of side $‘b’$ and mass $M$ rest on a rough horizontal table.$ A$ horizontal force $F$ is applied normal to one of the face at $a$ point, at $a$ height $3b/4$ above the base. What should be the coefficient of friction $(\mu )$ between cube and table so that is will tip about an edge before it starts slipping?
→