List of top Physics Questions

Which of the following is a characteristic temperature for the thermocouple?
By photoelectric effect, Einstein proved
A charge Q is situated at the corner of a cube, the electric flux passed through all the six faces of the cube is
The value of quality factor is
The bob of simple pendulum having length l, is displaced from mean position to an angular position q with respect to vertical. If it is released, then velocity of bob at equilibrium position
A body of mass $3\,kg$ hits a wall at an angle of $60^{\circ}$ and returns at the same angle. The impact time was $0.2\, sec$. The force exerted on the wall
The half-life of a radioactive isotope is 3 h. If the initial mass of the isotope was 300 g, the mass which remained undecayed after 18 h would be
The potentiometer is best for measuring voltage,as:
Which species does not exhibits paramagnetism:
Two masses as shown in the figure are suspended from a massless pulley. The acceleration of the system when masses are left free is
A tall man of height 6 feet, want to see his full image. Then required minimum length of the mirror will be
Calculate the net resistance of the circuit between A and B :
The kinetic energy of a body becomes four times its initial value. The new linear momentum will be
A car starts with acceleration $2\,m s^{-2}$. A scooterist starts towards the car with a velocity of $20\,ms^{-1}$. If the scooterist was $96\,m$ behind the car at the start, the time in which he overtakes the car is
$10\,CC$ of hydrogen and oxygen each are kept in separate flasks. Then the correct statement is
In Young's double slit experiment the separation between the slits is halved and the distance between the slits and the screen is doubled. The fringe width will
Equation of progressive wave is given by $y=a \, \sin\,\pi(40t-x)$ where $a$ and $x$ are in metre and $t$ in second. The velocity of the wave is (m/s)
A particle starts from (0,0) and moves along y-axis to a point (0,26) m and then to (0, -26) m. The ratio between distance and displacement is
In a charged capacitor the energy is stored in
Waves that cannot be polarised are
Radio waves and visible light in vacuum have
The resistance of an ideal ammeter is
Gravitational force is required for
A body of weight 72 N moves from the surface of earth at a height half of the radius of earth, then gravitational force exerted on it will be
Law of gravitation is not applicable if A) Velocity of moving objects are comparable to velocity of light B) Gravitational field between objects whose masses are greater than the mass of sun.