List of top Physics Questions asked in KEAM

A block of mass $M$ moves with a velocity $v$ along a frictionless horizontal surface towards another block of mass $2M$ at rest. The velocity of the center of mass of the system of blocks is

When $n$ identical cells are connected in parallel, they give

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

In bringing a proton towards another proton, the electrostatic potential energy of the system

A particular color of light has a wavelength of 663 nm. What is the energy possessed by the light?
(Planck’s constant $h = 6.63 \times 10^{-34}$ J·s; Velocity of light $c = 3 \times 10^8$ m/s)

Resistivity of a conductor increases with

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

The energy stored in a soap bubble of diameter 4 cm is nearly (surface tension of soap solution is 0.07 N/m)

Half-life of radon is 3.5 days. The amount of radon left out of 12 mg mass undecayed after 35 days is nearly

For a paramagnetic material, the magnetic susceptibility $ \chi_m $ is

When a spring of spring constant $k$ is cut into two pieces whose lengths are $l_1$ and $l_2$, then the ratio of their spring constants $k_1$ and $k_2$ is

A man loses 50% of his velocity after running a distance of 100 m. If his retardation is uniform, the distance he will cover before coming to rest is

Which of the following has the maximum Young’s modulus value?

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

A parallel plate capacitor with a dielectric medium of dielectric constant 1.5 has a capacitance of $C$. If the dielectric is removed, then the capacitance of the capacitor becomes

A particle moves under the influence of a force in the XY-plane such that the components of its linear momentum $\vec{p}$ at any time $t$ are given by $p_x = p \sin t$ and $p_y = p \cos t$. The angle between $\vec{F}$ and $\vec{p}$ at that time is

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

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

The correct order of arrangement of electromagnetic waves according to their wavelengths is

A particle is describing a uniform circular motion with a certain constant speed. The INCORRECT statement is

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)