List of top Physics Questions asked in KEAM

Huygen's wave theory of light could not explain
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
Choose the wrong statement.
A solid sphere and a hollow sphere, both of the same size and same mass roll down an inclined plane .Then
If the rms value of sinusoidal input to a full wave rectifier is $\frac{V_0} { \sqrt{2}}$ then the rms value of the rectifier?s output is
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
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 ground receiver in line-of-sight communication cannot receive direct waves due to
A force of 1N acting on a body of mass 2 kg produces in it an acceleration of (in ms)
For a monatomic gas, the molar specific heat at constant pressure divided by the molar gas constant $R$ is equal to
A ball $A$ is thrown up vertically with a speed $u$ and at the same instant another ball $B$ is released from a height $h$. At time $t$, the speed of $A$ relative to $B$ is
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
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
An object, moving with velocity $5\,m / s$, undergoes an acceleration of $1\,m / s ^{2}$ at time $t=0 .$ If the object has a mass of $1\,kg$, the kinetic energy ( KE) of the object at time $t=5\, s$ is
A carbon resistor is marked with the ring coloured brown, black, green and gold. The resistance in ohm is
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
The dimensional formula for rate of doing work 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 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 $T_2 - \Delta T$
The polarity of induced emf is given by
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
The current $ I $ through $ 10\,\Omega $ resistor in the circuit given below is