List of top Physics Questions asked in KEAM

If the instantaneous displacement of a wave is $y = 2(\sin 2\pi t + \sqrt{3}\cos 2\pi t)\,cm$, then the amplitude of the wave in $cm$ is
If the electric potential is given by $V = 3x^2 + 4x$ volt, then the magnitude of the electric field at the point $x = 1m$ is
The equation of a transverse wave in a string, $y = 3\sin 2\pi (25t + 0.4x)$ m. The wavelength of the wave is
If the scalar product of two vectors $x\hat{i} + 3\hat{j} + 2\hat{k}$ and $2\hat{i} - 3\hat{j} + 4\hat{k}$ is 9, then the value of $x$ is:
Among the following the INCORRECT statement is
If a gun fires 25 bullets in one second, each of $10g$ mass with a velocity of $20\,ms^{-1}$, then the recoil force on the gun in $N$ is:
A ball of $200g$ mass moving with a speed of $5\,ms^{-1}$ collides with a wall and bounces back with the same speed. If the force exerted on the wall is $1N$, then the ball is in contact with the wall for:
The moment of inertia of a solid sphere of radius $20cm$ about its diameter is same as that of a solid cylinder of same mass about its axis, then the radius of the cylinder in $cm$ is
A block of $10\,kg$ mass moving on a frictionless surface with speed $5\,ms^{-1}$ compresses a spring by $5cm$ and comes to rest. The force constant of the spring (in $Nm^{-1}$) is:
Which one is not an extensive variable?
There is no change in internal energy of an ideal gas in an
Two capillary tubes of radii in the ratio $1:2$ are dipped in the same liquid. The ratio of heights through which the liquid will rise in the tubes is
Which one of the following materials has the highest modulus of elasticity?
The relative viscosity of blood $\left(\frac{\eta}{\eta_{water}}\right)$ is constant between
Experimental P-V curves and theoretically predicted P-V curves are in good agreement at
A source of frequency \(f\) gives 5 beats/sec when sounded with a source of frequency 200 Hz. The second harmonic of \(f\) gives 10 beats/sec when sounded with a source of frequency 420 Hz. The value of \(f\) is:
A particle of mass \(m\) is moving in a circular path of constant radius \(r\) such that its centripetal acceleration \(a_{c}\) is varying with time \(t\) as \(a_{c} = k^{2}rt^{2}\), where \(k\) is a constant. The power delivered to the particle by the forces acting on it is:
In a Young's double slit experiment, the intensity at a point where the path difference is \( \frac{\lambda}{6} \) (\( \lambda \) being the wavelength of light used) is \( I \). If \( I_{0} \) denotes the maximum intensity, \( I/I_{0} \) is equal to:
A container with a pin hole at the bottom is filled with water and kerosene (specific gravity 0.8). The height of the water layer is 10 cm and the kerosene layer is 20 cm. The velocity of efflux of water is:
A light ray enters from medium 1 to medium 2. Its velocity in medium 1 is \( 2 \times 10^{8} \) m/s and in medium 2 is \( 1.5 \times 10^{8} \) m/s. The critical angle for the pair of media is:
Kinetic energy of a particle of mass \( 1 \times 10^{31} \, \text{kg} \) and wavelength 63 nm (where \( h = 6.3 \times 10^{-34} \, \text{Js} \))
On an average, the number of neutrons and the energy of a neutron released per fission of a uranium atom are respectively
The semi-major axis of the orbit of Saturn is approximately nine times that of Earth. The time period of revolution of Saturn is approximately equal to
Two strings of the same material and same length are given equal tension. If they are vibrating with fundamental frequencies \( 1600 \text{ Hz} \) and \( 900 \text{ Hz} \), then the ratio of their respective diameters is
Pressure of liquid inside a vessel depends on?