List of top Physics Questions asked in KEAM

An oil drop of charge q and mass m is in equilibrium in an electric field E. The charge of the oil drop is
Two springs with constants k and 2k are connected in series and a mass m is hanged. The time period of oscillation is
An $\alpha$ particle and proton are accelerated in cyclotron under idential conditions. Find the ratio of their cyclotron frequncy
A Bar magnet has a magnetic moment M and length l. If its length is reduced to half, find its new magnetic moment.
The graph between displacement and time for a particle moving with uniform acceleration is a ____.
The horizontal range of a projectile is maximum when the angle of projection is ____.
The dimensions for the gravitational constant $G$ are ____.
The slope of the tangent drawn on a position-time graph at any instant is equal to the instantaneous ____.
If the potential at A is zero, potential at B is
The work functions of two metals are 2.75 eV and 2 eV respectively. If these are irradiated by photons of energy 3 eV, the ratio of maximum momenta of the photoelectrons emitted respectively by them is
The magnetic flux (in weber) linked with a coil of resistance 10 Ω is varying with respect to time \( t \) as \( \phi = 4t^{2} + 2t + 1 \). Then the current in the coil at time \( t = 1 \) second is
A plane electromagnetic wave travels in free space along X-direction. If the value of B (in tesla) at a particular point in space and time is \( 1.2 \times 10^{-8} \hat{k} \). The value of E (in Vm⁻¹) at that point is
The de Broglie wavelength and kinetic energy of a particle is 2000 Å and 1 eV respectively. If its kinetic energy becomes 1 MeV, then its de Broglie wavelength is
The electromagnetic waves travel with
When ice at $0^\circ\text{C}$ is heated and converted into steam at $100^\circ\text{C}$, which graph correctly represents the variation of temperature with heat supplied?
The force experienced by the Earth due to solar radiation is $9 \times 10^9$, N. Find the radiation pressure on Earth. (Radius of Earth R = $6.4 \times 10^6$, m)
In simple harmonic motion (SHM), the acceleration of a particle at a displacement of 3m from the mean position is $48\text{ m/s}^2$ directed towards the mean position. Find the angular frequency.
A particle moves in a circular path of radius 4 cm. It completes 5 revolutions in 2 minutes. Find its linear velocity.
A particle moves in a circular path of radius 4 cm
$\vec{P} = x\hat{i} + 0.8\hat{j} + 0.6\hat{k}$ If magnitude of $\vec{P}$ is 2, value of x is
The capacitance of a capacitor is C when there is air (or vacuum) between its plates. When a dielectric is completely inserted between the plates, the capacitance becomes 2C. Find the dielectric constant of the material.
A spring of spring constant 'k' cut into n pieces. What is the spring constant of each piece?
Two syringes have piston in the ratio 1 : 5. If the pressure exerted in both syringes is same, find the ratio of the forces applied on the piston.
The displacement of a body at any time t is given by \[ x = -\frac{3}{4}t^2 + 12t + 3 \] The velocity of the body is zero after:
Energy of electron of hydrogen atom in $3^{\text{rd}}$ excited state is