List of top Physics Questions asked in KEAM

When a metal spring is elongated within its elastic limit
Area under the force-time graph gives the change in
On a conveyor belt moving with a speed u, sand falls at a constant rate $\frac{dm}{dt}$ where m is the mass of sand. The extra force required to maintain the speed of
Which one of the following statement is INCORRECT?
When a body starts from rest and moves with a constant acceleration, the velocity- time graph for its motion is
The stopping distance of a moving vehicle is proportional to the
A hammer is dropped into a mine. Its velocities at depths d, 2d and 3d are in the ratio
The velocity of a moving particle at any instant is $\hat{i} + \hat{j}$. The magnitude and direction of the velocity of the particle are 
If the percentage errors in the measurements of mass, length and time are 1%, 2% and 3% respectively, then the maximum permissible error in the measurement of the acceleration of a particle is
A physical quantity A on multiplication with velocity results in another quantity B. If the quantity B is energy, then the quantity A is
Pick out the INCORRECT statement from the following
In a transmitter the audio signal of frequency $ω_m$ is modulated by the carrier signal $ω_c$ and the band pass filter in it rejects the frequencies
The compound semiconductor used for making LEDs of different colours is
In a CB mode of a transistor the current through the emitter is 6 mA. If the current gain of the transistor is 0.95 then its base current is
transistor
Eddy currents are not used in the applicalion of
The relation between the charge flow \(\Delta Q\) through the circuit of resistance \(r\) and the change in the magnetic flux \(\Delta \phi_B\) is
The electric potential \(V\) at any point \((x,y,z)\) in space is given by \(V=4xz^2\) volt, where \(x,y,z\) are all in metre. The electric field at that point \((1\text{ m},0,2\text{ m})\) in \(\text{V m}^{-1}\) is
The maximum line-of-sight distance \(d\) between the transmitting antenna of height \(h_t\) and receiving antenna of height \(h_r\) in LOS communication is \((R=\) radius of the earth\()\)
The gates that give output \(Y=0\) for the two inputs \(A=1\) and \(B=1\) are
In amplitude modulation of audio frequency \(700\) Hz, the appropriate carrier frequency to be used is
A nucleus, initially at rest, breaks up into two nuclear fragments with their radii in the ratio \(2:1\). Then their velocities will be in the ratio
The contribution to the total current in a semiconductor, due to electrons and holes are \(0.75\) and \(0.25\) respectively. The drift velocity of electrons is \(\dfrac{3}{2}\) times that of holes at this temperature. Then the ratio between electron concentration and hole concentration is
The ratio of the energy released by \(4\) kg of hydrogen at room temperature to the heat generated by \(23.5\) kg of \({}^{235}\text{U}\) in the nuclear reactor by fission process is (Assume energy released per fusion is \(26\) MeV and that per fission is \(200\) MeV)
If the Ge diode in the circuit is reverse biased, the current through \(2\ \text{k}\Omega\) resistor
In a common emitter amplifier, the input resistance and output resistance are \(200\ \Omega\) and \(50\ \text{k}\Omega\) respectively. If the voltage gain of the amplifier is \(50\), then the power gain is