List of top Physics Questions asked in KEAM

When rigid body has neither linear acceleration nor angular acceleration then it is said to be in
A given sample of an ideal gas occupies a volume $V$ at a pressure $P$ and absolute temperature $T$. The mass of each molecule of the gas is $m$. Which of the following gives the density of the gas ?

Kepler's second law (law of areas) of planetary motion leads to law of conservation of

Choose the wrong statement
The pair of rigid bodies with mass M and radius R, having the moment of inertia $\frac{MR^{2}}{2}$ can be
The equation of continuity in incompressible fluid flow is based on the principle of conservation of
The flow of liquid in a tube is laminar, when the value of Reynold�s number lies between
The self inductance of a long solenoid carrying current is independent of
The emergent ray of light after refraction at a rectangular glass slab
The electric field strength in $N \,C\,^{-1}$ that is required to just prevent a water drop carrying a charge $1.6 \times 10^{-19} \, C$ from falling under gravity is $(g\, = \,9.8\, ms^{-2}$, mass of water drop = $0.0016\,g$)
The power radiated by a linear antenna of length \(\ell\) at wavelength \(\lambda\) is
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 \(R = 6400\,km\))
Pick out the wrong statement
Identify the mismatched pair
The electrical conductivity of a semiconductor increases when electromagnetic radiation of wavelength shorter than 600 nm is incident on it. The energy band gap (in eV) for the semiconductor is
In a PNP transistor, \(10^{10}\) holes enter the emitter in \(10^{-6}\,s\). If 2% of holes is lost in the base, then the current amplification factor is
In a semiconductor, \(\frac{2}{3}\)rd of the total current is carried by electrons and remaining \(\frac{1}{3}\)rd by holes. If at this temperature, the drift velocity of electrons is 3 times that of holes, the ratio of number density of electrons to that of holes is
For which one of the following input combinations, the given logic circuit gives the output \(Y = 1\)?
In a series of radioactive decays, if a nucleus of mass number 180 and atomic number 72 decays into another nucleus of mass number 172 and atomic number 69, then the number of alpha and beta particles released respectively are
The binding energy per nucleon for deuteron \((^2_1H)\) and helium \((^4_2He)\) are 1.1 MeV and 7.0 MeV respectively. The energy released when two deuterons fuse to form a helium nucleus is
A radioactive sample contains \(10^{-3}\,kg\) each of two nuclear species A and B with half-life 4 days and 8 days respectively. The ratio of the amounts of A and B after 16 days is
The maximum velocities of the photoelectrons ejected are \(v\) and \(2v\) for incident light of wavelength \(400\,nm\) and \(250\,nm\) respectively. The work function of the metal in terms of Planck’s constant \(h\) and velocity of light \(c\) is
A ray of light is incident normally on one refracting surface of an equilateral prism. If the refractive index of the material of the prism is 1.5, then
Identify the wrong sign convention
If a ray of light is incident at a glass surface at the Brewster’s angle of \(60^\circ\), then the angle of refraction inside glass is