List of top Physics Questions

The potential energy of a particle performing linear S.H.M is $ 0.1 \pi^2 x^2 $ joules. If the mass of the particle is $ 20 \, \mathrm{g} $, find the frequency of S.H.M:

The time period of SHM is $ 2 \, \mathrm{s} $ with mass $ m $. If an additional mass of $ 40 \, \mathrm{g} $ is added, the time period increases by $ 3 \, \mathrm{s} $. What is $ m $ (in grams)?

The height from Earth's surface at which acceleration due to gravity becomes $\frac{g}{4}$ is $\_\_$? (Where $g$ is the acceleration due to gravity on the surface of the Earth and $R$ is the radius of the Earth.)

In a coil, the current changes from $ -2 \, \text{A} $ to $ +2 \, \text{A} $ in $ 0.2 \, \text{s} $ and induces an emf of $ 0.1 \, \text{V} $. The self-inductance of the coil is:

Find the ratio of K.E. and P.E. when a particle performs SHM when it is at $ \frac{1}{n} $ times of its amplitude from the mean position.

The speed of a wave is $ 30 \, \mathrm{m/s} $. If the distance between 11 crests is $ 1 \, \mathrm{m} $, what is the frequency (in Hz)?

The velocity of sound in a gas in which two wavelengths $ 4.08 \, \text{m} $ and $ 4.16 \, \text{m} $ produce 40 beats in 12 seconds will be:

A mixture of one mole of monoatomic gas and one mole of diatomic gas (rigid) are kept at room temperature ($ 27^\circ \text{C} $). The ratio of specific heat of gases at constant volume respectively is:

The fundamental frequency of a closed organ pipe of length $ 20 \, \mathrm{cm} $ is equal to the second overtone of an organ pipe open at both ends. What is the length of the organ pipe open at both ends?

If $ p $ is the magnitude of linear momentum of a particle executing a uniform circular motion, then the ratio of centripetal force acting on the particle to its linear momentum is given by:

For a uniform rectangular sheet shown in the figure, the ratio of moments of inertia about the axes perpendicular to the sheet and passing through $ O $ (the center of mass) and $ O' $ (corner point) is:

$ I_g = 8\% \times I $. What is $ S $ (shunt) connected in terms of $ G $?

Three charges $ +q $ are placed at the corners of an equilateral triangle of side $ a $. What would be the total electrostatic potential energy (in terms of $ k $)?

"Water is flowing through a horizontal pipe in stream line flow at the narrowest part of the pipe?"

The longest wavelength associated with the Paschen series is: $$ \text{(Given } R_H = 1.097 \times 10^7 \, \text{SI unit)}. $$

Water is flowing through a horizontal pipe in streamline flow. At the narrowest part of the pipe:

Eight equal drops of water are falling through air with a steady speed of $ 10 \, \text{cm/s} $. If the drops coalesce, the new velocity is:

A wire of length $ 1 \, \text{m} $ moving with velocity $ 8 \, \text{m/s} $ at right angles to a magnetic field of $ 2 \, \text{T} $. The magnitude of induced emf between the ends of the wire will be:

The ratio of the mass densities of nuclei of $ ^{40}\text{Ca} $ and $ ^{16}\text{O} $ is close to:

A particle is executing Simple Harmonic Motion (SHM). The ratio of potential energy and kinetic energy of the particle when its displacement is half of its amplitude will be:

A star 'A' has radiant power equal to 3 times that of the Sun. The temperature of star 'A' is $ 6000 \, \mathrm{K} $ and that of the Sun is $ 2000 \, \mathrm{K} $. What is the ratio of their radii?

An electric field is given by $ \vec{E} = (6\hat{i} + 5\hat{j} + 3\hat{k}) \, \text{N/C} $. The electric flux through a surface area $ 30\hat{i} \, \text{m}^2 $ lying in the YZ-plane (in SI units) is:

When two soap bubbles of radii $ a $ and $ b $ ($ b>a $) coalesce, the radius of curvature of the common surface is:

When unpolarized light is incident at an angle of 60° on a transparent medium from air. The reflected ray is completely polarized. The angle of refraction in the medium is

The sphere A of mass $ m $ moving with a constant velocity hits another sphere B of mass $ 2m $ at rest. If the coefficient of restitution is 0.4, the ratio of the velocities of the spheres A and B after collision is