List of top Physics Questions asked in KEAM

Isobars are atoms with the same
The number of significant figures in 0.0500L is
Which one of the following is not a semiconductor?
In a p-n junction diode, reverse biasing
Half-life of radon is 3.5 days. The amount of radon left out of 12 mg mass undecayed after 35 days is nearly
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