List of top Questions asked in KEAM

If the nuclear radius of $^{125}_{52}\text{Te}$ is 6 fermi, then the nuclear radius of $^{27}_{13}\text{Al}$ in fermi is
In a nuclear decay, after the emission of one $\alpha$-particle and one $\beta$-particle
When the hydrogen atom is excited from the ground state,
The photoelectric work function for a photosensitive material is 5.2 eV. The energy of the incident radiation for which the stopping potential is 6 V is

If the speed of a moving particle is decreased by 1%, the de Broglie wavelength of the wave associated with it

In Young’s double slit experiment, to change the bandwidth from $\beta$ to $\frac{\beta}{4}$ without changing the experimental setup, the wavelength of light $\lambda$ used must be changed to

If the ratio of amplitudes of two light waves is 2 : 1, then the ratio between the intensities of the two waves is
An ink mark is made on a piece of paper and a glass slab of thickness $t$ and refractive index $\mu$ is placed on it. If the image of the ink mark appears to be at a distance of $x$ from the top surface of the slab, then the value of $x$ is
The correct order of arrangement of electromagnetic waves according to their wavelengths is
The number of windings in the primary and secondary of a transformer are 100 and 2000 respectively. If 50 V a.c is applied to the primary, the potential difference across the secondary is
An alternating current having peak value 14.14 A is used to heat a metal wire. The value of the direct current \(i\) required to produce the same heating effect in the same wire is
For a paramagnetic material, the magnetic susceptibility \( \chi_m \) is
The magnetic moment $\mu$ associated with a charged particle carrying charge $q$ moving in a circle of radius $a$ with uniform speed $v$ is
The magnetic force acting on a charged particle carrying a charge $3 \mu C$ in a magnetic field of $5$ T acting in the $y$-direction, when the particle velocity is \[ (\hat{i} + \hat{j}) \times 10^5 { ms}^{-1} \] is
Kirchhoff’s junction rule is based on conservation of
Resistivity of a conductor increases with
When \(n\) identical cells are connected in parallel, they give
In bringing a proton towards another proton, the electrostatic potential energy of the system
When a glass rod is rubbed with silk thread, it loses 1000 electrons. Then the charge on the glass rod is (electronic charge $e = 1.6 \times 10^{-19}$ C)
The velocity of a travelling plane wave given by \[ y = 10^{-2} \sin \left( 200t - \frac{x}{5} \right) m, \] is

The instantaneous displacement of a particle executing simple harmonic motion is given by \(x = 2(\cos(\pi t) + \sin(\pi t))\). 
The amplitude of oscillation is

The average kinetic energy per molecule of an ideal gas at \(27^\circ C\) is \(E\). The temperature of the gas at which the average kinetic energy per molecule will be \(2E\) is
The pressure of an ideal gas is proportional to the cube of its temperature (on absolute scale) in an adiabatic process. Then the value of the ratio $C_p/C_v$ is
When water is heated from $0^\circ$C to $8^\circ$C, its volume
Two perfectly black bodies are at temperatures \( T \) and \( 2T \). The ratio between the wavelengths corresponding to maximum energy emission by the two black bodies is