List of top Physics Questions asked in Punjab PMET

A charged particle is suspended in equilibrium in a uniform vertical electric field of intensity $ 20000\,\,V/m $ . If mass of the particle is $ 9.6\times {{10}^{-16}}kg $ , the charge on it and excess number of electrons on the particle are respectively $ (g=10\,m/s^2) $ :
The kinetic energy of an electron is $ 5\,\,eV $ . Calculate the de-Broglie wavelength associated with it ( $ h=6.6\times {{10}^{-34}}\,\,Js $ , $ {{m}_{e}}=9.1\times {{10}^{-31}}kg $ ):
A siren emitting sound of frequency 500 Hz is going away from a stationary listener with a speed of $ 50\,\,m/s $ , the frequency of sound to be heard directly from the siren is:
A resonance air column of length $ 40\,\,cm $ resonates with a tuning fork of frequency $ 450\,\,Hz $ . Ignoring end correction, the velocity of sound in air will be:
The work done in pulling up a block of wood weighing $ 2\,\,kN $ for a length of $ 10\,\,m $ on a smooth plane inclined at an angle of $ {{15}^{o}} $ with the horizontal is:
The peak value of alternating current is $ 5\sqrt{2} $ ampere. The mean square value of current will be:
In junction diode, the holes are because of:
The horizontal range of a projectile is $ 4\sqrt{3} $ times its maximum height, then the angle of projection is
Assuming earth to be a sphere of a uniform density, the value of $g$ in a mine $100\, km$ below the earth surface will be
The angular speed of earth, so that the object on equator may appear weight less, is $ (g=10)\,m/s^{2}$ , radius of earth $6400\,km$
Mass of moon is $ 1/81 $ times that of earth and its radius is $ 1/4 $ the radius of earth. If escape velocity on the surface of the earth is $11.2\,km/s $ . Then the value of escape velocity at surface of the moon will be
Pressure inside two soap bubbles are $1.01$ and $1.02$ atmospheres. Ratio between their volumes is
If a cycle wheel of radius $4\,m $ completes one revolution in two seconds. Then acceleration of the cycle will be
A block slides down an inclined plane making an angle $ \theta =30^{\circ}$ with the horizontal with an acceleration $ \frac{g}{4} $ , then coefficient of frictions will be
A running man has half the kinetic energy of that of a boy of half of his mass. The man speeds up by $ 1\,m/s$ so as to have same K.E. as that of the boy. The original speed of the man will be
A cyclist moves in a circular track or radius $ 100\,m $ . If the coefficient of friction $ 0.2 $ . Then the maximum speed with which the cyclist can take a turn without leaving inwards, is
A wheel of mass $ 10\,kg $ has a moment of inertia of $ 160\,kg-m^2 $ about its own axis, the radius of gyration will be