List of top Physics Questions asked in KEAM

The ratio of angular speeds of the minute hand and second hand of a watch is
\( [L^0 M^0 T^{-1}] \) is the dimensional formula for
If the velocity (in \( \text{m s}^{-1} \)) of a particle at any instant \( t \) is given by \( 2.0\hat{i} + 3.0t\hat{j} \), then the magnitude of its acceleration (in \( \text{m s}^{-2} \)) is
If \( 2.7\times10^{-6} \) is added to \( 4.3\times10^{-5} \), giving due regard to significant figures, the result will be
Among the following pairs of vectors, if the resultant of two vectors can never have magnitude 4 units, the magnitudes of the vectors are
In the nuclear process, 1122Na → 1022Ne + e+ + νe, then X is
The eye defect astigmatism can be corrected by using a
The force acting on the particle of 0.2 kg mass whose displacement is described by the equation \( x = 3t + 7t^2 \, \text{m} \)
If the position of the particle as a function of time \( t \) is \( \vec{r} = 8t \hat{i} + 3t^2 \hat{j} + 3 \hat{k} \, \text{m} \), then the acceleration of the particle is (in \( \text{m/s}^2 \))
The dimensions of \( \frac{B}{E} \) are (B: Magnetic induction, E: Electric field intensity)
A hockey player hits a ball with an impulse of 15 Ns. If time of hit is 0.2 s, the average force exerted by the player on the ball is
The energy density of the electric field \( 2 \, \text{V/m} \) in a capacitor \( C \) is \( \varepsilon_0 \) is the permittivity of free space
If the amplitude of the wave \( y = 3\sin(3x - 5t) + A\cos(3x - 5t) \) m is 5 m, the value of A is
A bullet of 10 g mass is fired at a speed of 50 m/s by a gun of 2 kg mass. The recoil speed of the gun (in m/s) is
Angular momentum of a particle will not be zero, if the
An ideal Carnot engine has an efficiency of 40 %. The ratio of the temperature of the sink to that of the source is
A carbon resistor has a tolerance of 20\%. As per the colour codes of resistors, the last band in that resistor is
When a current of 2 A flows through a wire for 2.5 s, the amount of heat liberated is 20 J. The resistance of the wire is
In dielectrics, polarization is the dipole moment per unit
If the frequency of an electromagnetic wave is 2 MHz, then the time period of oscillation of the accelerated charge is
If a particle is moving with a momentum of (2 × 1010) h kg·m/s, then the de Broglie wavelength associated with it (in angstrom) is (where h is Planck's constant)
For the oscillations of a spring with spring constant k, the false statement is
The flux linked with a coil at any instant is given by \( \Phi = 5t^2 - 25t - 150 \) (in SI units). The emf induced in the coil at \( t = 2 \) s is
Which one of the following principles helps to explain the flow of blood in an artery?
The angular momentum of the electron revolving in the 2nd orbit is