List of top Physics Questions

A network of five capacitors is shown in the figure. The total charge stored in the network connected between A and B is:

A 500 nm photon is incident normally on a perfectly reflecting surface and is reflected. The value of momentum transferred to the surface is:

The displacement of a particle executing SHM is given by $x = 0.01 \sin(100\pi t + 0.05)$. Its maximum velocity is:

A refrigerator has a coefficient of performance of 5. If the temperature inside the freezer is $-20^{\circ}C$, the temperature of the surroundings to which it rejects heat is:

In an isothermal expansion of an ideal gas, the heat supplied to the gas is:

If the absolute temperature of a black body is doubled, the frequency corresponding to maximum emissive power becomes:

An infinite line charge of uniform linear charge density $\lambda$ is placed along the $z$-axis. The work done in moving a charge $q$ from $(a,\,0,\,0)$ to $(2a,\,0,\,0)$ is:

A parallel plate capacitor has capacitance $C$. If a dielectric slab of dielectric constant $K$ and thickness equal to half the plate separation is introduced parallel to the plates, the new capacitance is:

Unpolarized light of intensity $I_0$ is incident on two polaroids placed coaxially. The transmission axis of the second polaroid is at an angle of $60^\circ$ to the first. The intensity of emerging light is:

An open pipe resonates with a tuning fork of frequency 500 Hz. It is observed that two successive nodes are separated by 34 cm. The velocity of sound in air is:

% Question A pendulum clock gives correct time at $20^\circ$C. If the coefficient of linear expansion of the pendulum's material is \alpha = 1.2 \times 10^{-5} /^\circC, the clock will lose time per day at $40^\circ$C by approximately:

A particle executes simple harmonic motion of amplitude A and time period T. The time taken by the particle to travel from the mean position to a distance of A/2 is:

A Carnot engine operates between temperatures T₁ and T₂ (T₁ > T₂). If T₁ is increased by ∆T and T₂ is decreased by ∆T, its efficiency will:

An ideal gas undergoes a cyclic process ABCA wherein AB is an isothermal expansion, BC is an isochoric pressure drop, and CA is an adiabatic compression. The work done by the gas in the complete cycle is:

Water flows through a horizontal pipe. At one point, the velocity is \(2\ \text{m/s}\) and the pressure is \(2\ \text{m}\) of water column. What is the pressure at another point where the velocity is \(3\ \text{m/s}\)?
(Density of water \(=10^3\ \text{kg/m}^3\))

The work done in increasing the radius of a soap bubble from \(R\) to \(2R\) is \(W\). The work done in further increasing its radius from \(2R\) to \(3R\) will be:

A uniform solid sphere of mass \(M\) and radius \(R\) is placed on a smooth horizontal surface. It is struck by a horizontal cue at a height \(h\) above the center. For the sphere to roll without slipping immediately after the impact, the value of \(h\) must be:

Eight identical spherical liquid drops, each falling with a terminal velocity \(v\), coalesce to form a single large drop. The terminal velocity of the new large drop is:

Water flows through a horizontal pipe. At one point, the velocity is $2~m/s$ and the pressure is $2~m$ of water column. What is the pressure at another point where the velocity is $3~m/s$?
(Density of water $=10^3~kg/m^3$)

The work done in increasing the radius of a soap bubble from $R$ to $2R$ is $W$. The work done in further increasing its radius from $2R$ to $3R$ will be:

A disc of mass $M$ and radius $R$ has a concentric hole of radius $\dfrac{R}{2}$. Its moment of inertia about an axis passing through its center and perpendicular to its plane is:

An ideal gas is compressed isothermally. During this process:

A gas undergoes an adiabatic process. During this process:

A light ray enters a glass slab of refractive index \( \mu = 1.5 \) from air. What is the speed of light inside the glass slab? (Speed of light in air \( c = 3 \times 10^8 \text{ m/s} \))