MCQ
Which of the following is a dimensional constant?
  • Gravitational constant
  • B
    Relative density
  • C
    Refractive index
  • D
    Poisson ratio

Answer

Correct option: A.
Gravitational constant
a
Gravitational constant also known as universal gravitational constant has a symbol $G$ and has a dimension $\left[ M ^{-1} L ^3 T ^{-2}\right]$ while others are dimensionless constant.

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

Similar questions

A ball of mass $m$ is attached to a string whose other end is fixed. The system is free to rotate in vertical plane. When the ball swings, no work is done on the ball by the tension in the string. Which of the following statements is the correct explanation?
A string of length 0.4m and mass 10-2kg is tightly clamped at the ends. The tension in the string is 1.6N. Identical wave pulses are produced at one end at equal intervals of time $\Delta\text{t}.$ The minimum value of $\Delta\text{t}$ which allows constructive interference between successive pulses is:
A particle of mass $100\,g$ is projected at time $t =0$ with a speed $20\,ms ^{-1}$ at an angle $45^{\circ}$ to the horizontal as given in the figure. The magnitude of the angular momentum of the particle about the starting point at time $t=2\,s$ is found to be $\sqrt{ K }\,kg\,m ^2 / s$. The value of $K$ is $............$ $\left(\right.$ Take $\left.g =10\,ms ^{-2}\right)$
Two point masses of mass $m_1 = fM$ and $m_2 = (1 -f)\,M\,(f < 1 )$ are in outer space ( far from gravitational influence of other objects) at a distance $R$ from each other. They move in circular orbits about their centre of mass with angular vaocities $\omega _1$ for $m_1$ and $\omega _2$ for $m_2.$ In that case
A particle is dropped from a height $h$. A constant horizontal velocity is given to the particle. Taking $g$ to be constant every where, kinetic energy $E$ of the particle w. r. t. time t is correctly shown in
Two projectile thrown at $30^{\circ}$ and $45^{\circ}$ with the horizontal respectively, reach the maximum height in same time. The ratio of their initial velocities is
Apparatus used to find out the velocity of sound in gas is
Frequency is the function of density $(\rho )$, length $(a)$ and surface tension $(T)$. Then its value is
A ball is projected with a velocity, $10 ms ^{-1}$, at an angle of $60^{\circ}$ with the vertical direction. Its speed at the highest point of its trajectory will be$............... ms ^{-1}$
Surface tension of a soap bubble is $2.0 \times 10^{-2}\; Nm ^{-1}$. Work done to increase the radius of soap bubble from $3.5\; cm$ to $7\; cm$ will be $.........\times 10^{-4}\,J$ [Take $\pi=\frac{22}{7}$ ]