List of top Physics Questions asked in KEAM

According to Kepler's law of planetary motion if $ T $ represents time period and $ r $ is orbital radius, then for two planets these are related as :
An electric dipole of dipole moment $\overrightarrow{p}$ is placed in a uniform external electric field $\overrightarrow{E}$. Then the
Two wires of the same material having equal area of cross section have lengths L and 2L. Their respective resistances are in the ratio
Huygen's wave theory of light could not explain
Ampere?s circuital law can be derived from
A man of mass $60 \,kg$ climbed down using an elevator. The elevator had an acceleration $4 \, ms^{-2}$. If the acceleration due to gravity is $10 \, ms^{-2}$, the main apparent weight on his way down is
Ice pieces are floating in a beaker $A$ containing water and also in a beaker $B$ containing miscible liquid of specific gravity $1.2$. When ice melts, the level of
A 10 $\mu$F capacitor is charged to a potential difference of 1000 V. The terminals of the charged capacitor are disconnected from the power supply and connected to the terminals of an uncharged 6 $\mu$F capacitor. What is the final potential difference across each capacitor?
A hot liquid is filled in a container and kept in a room of temperature of 25$^{\circ}$C. The liquid emits heat at the rate of 200 Js$^{-1}$ when its temperature is 75$^{\circ}$C. When the temperature of the liquid becomes 40$^{\circ}$C, the rate of heat loss is J s$^{-1}$ is
A force of 1N acting on a body of mass 2 kg produces in it an acceleration of (in ms)
A ground receiver in line-of-sight communication cannot receive direct waves due to
For a monatomic gas, the molar specific heat at constant pressure divided by the molar gas constant $R$ is equal to
The phase velocity of a wave described by the equation $\Psi = \Psi_0 \, \sin (kx + \omega t + \pi / 2)$ is
The dimensional formula for rate of doing work is
Four point charges (with equal magnitude of charge of $5\, C$; but with different signs) are placed at four corners of a square of side $10\, m.$ Assuming that the square is centered at the origin and the configuration of the charges are as given in the figure, the potential and the magnitude of electric field at the origin, respectively are [ Note : $k = \frac{1}{4 \pi \varepsilon_0}$]
The apparent frequency observed by a moving observer away from a stationary source is $20\%$ less than the actual frequency. If the velocity of sound in air is $330 \; ms^{-1}$ , then the velocity of the observer is
The polarity of induced emf is given by
An experiment measures quantities $a$, $b$ and $c$, and quantity $X$ is calculated from $X= ab^2/c^3$. If the percentage error in $a$, $b$ and $c$ are $\pm 1\%$, $\pm 3\%$ and $\pm 2\%$, respectively, then the percentage error in $X$ will be
A battery of $6\,V$ and internal resistance $2 \Omega$ is connected to a silver voltameter. If the current of $1.5\, A$ flows through the circuit, the resistance of the voltameter is
A linear harmonic oscillator with force constant 3.210N m and amplitude 0.01 m has a
A metallic bar of coefficient of linear expansion $10^{-5} K^{-1}$ is heated from $0^{\circ}C$ to $100^{\circ}C$. The percentage increase in its length is
A carbon resistor is marked with the ring coloured brown, black, green and gold. The resistance in ohm is
If $m$ represents the mass of each molecule of a gas and $T$, its absolute temperature, then the root mean square velocity of the gaseous molecule is proportional to
A ground receiver receives a signal at $5\, MHz$, transmitted by a ground transmitter at a height of $320\, m$, which is $110\, km$ away from it. Then it can communicate through (radius of earth $R \,= \,6400 \,km$)
A Carnot engine is operating between a hot body and cold body maintained at temperature $T_1$ and $T_2$ respectively. Consider the following three cases : The temperature of the hot body is changed to $T_1 + \Delta T$ and cold body is at $T_2$ : The temperature of the hot body is at $T_1$ and cold body is changed to $T_2 + \Delta T$ : The temperature of the hot body is at $T_1$ and cold body is changed to $T_2 - \Delta T$