List of top Questions asked in KEAM

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 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 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
When two different liquids of same mass but at two different temperatures \(27^\circ C\) and \(47^\circ C\) are mixed together, the resulting temperature of the mixture is \(35^\circ C\). The ratio of their specific heat capacities is
The energy stored in a soap bubble of diameter 4 cm is nearly (surface tension of soap solution is 0.07 N/m)
Which of the following has the maximum Young’s modulus value?
The gravitational potential energy of a system of two bodies each of mass $m$ and distance $r$ between them is (G = gravitational constant, g = acceleration due to gravity)
The radius of gyration of a regular solid cylinder of radius $R$ about its axis is
If $P$ is the pressure at which the heart is pumping the blood and the volume of blood pumped per second is $V$, then the power of the heart is given by
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
In a ‘tug of war’ game, two persons pull each other through a massless rope. The person who wins is
A particle is describing a uniform circular motion with a certain constant speed. The INCORRECT statement is
Dimensions of the physical quantity $X$ in the equation \[ {Force} = \frac{X}{{Volume}} \] are
The correct order of variation of first ionisation enthalpies is:
The number of S-S bonds and the number of lone pairs in S8 molecule,respectively,are: