MAH-MHT CET (PCM/PCB) entrance exam Question Bank Solutions for Physics

The number of molecules in 100 cc of gas at N.T.P. is ______ if the mass of each molecule is 4.556 x 10^-25 kg and R.M.S. speed is 250 m/s. 

In amplitude modulation,

Two small drops of mercury each of radius 'R' coalesce to form a large single drop. The ratio of the total surface energies before and after the change is ____________.

The velocity of light in glass is 2 x 10⁸ m/s. If the refractive index of glass with respect to water is 9/8, then the velocity of light in water is ______

The molecular weights of oxygen and hydrogen are 32 and 2 respectively. The root mean square velocities of oxygen and hydrogen at N.T.P. are in the ratio ______

When a simple harmonic progressive wave is travelling through a medium, then each succeeding particle ______

Two spherical rain drops reach the surface of the earth with terminal velocities having ratio 16 : 9. The ratio of their surface area is ______.

The total energy of the body executing S.H.M. is E. The kinetic energy of the body, when the displacement is half of the amplitude is ______.

The root mean square velocity of molecules of a gas is 200 m/s. What will be the root mean square velocity of the molecules, if the molecular weight is doubled and the absolute temperature is halved?

Water rises upto a height h in a capillary tube on the surface of the earth. The value of h will increase, if the experimental setup is kept in [g = acceleration due to gravity]

If the surface tension of a soap solution is 3 × 10^-2 N/m then the work done in forming a soap film of 20 cm × 5 cm will be ______.

A ray of light is incident at an angle i on one face of a thin angled prism. The ray emerges normally from the other face. Refractive index of the glass prims is n and angle of prism is A. The value of i is ______.

Two coils have a mutual inductance of 0.01 H. The current in the first coil changes according to equation, I = 5 sin 200 πt. The maximum value of emf induced in the second coil is ________.

The equation of simple harmonic progressive wave is given by Y = a sin 2π  (bt - cx). The maximum particle velocity will be twice the wave velocity if ______.

A thin hollow prism of refracting angle 3°, filled with water gives a deviation of 1°. The refractive index of water is ______.

When a mass is hung from a light spring, the spring extends by 10 cm. If the mass is pulled down and let go, it executes S.H.M. with a time period (g = 10 m/s²) ____________.

A particle is executing S.H.M. with amplitude of 4 cm and time period 12 s. The time taken by the particle in going from its mean position to a position of displacement equal to 2 cm is T₁ The time taken from this displaced position of 2 cm to reach the extreme position is T₂. T₁/ T₂ will be____________.

To what temperature should hydrogen at 227° C be cooled at constant pressure so that root mean square velocity of its molecule becomes half of its previous value?

Two travelling waves, y₁ = A sin [k (x + ct)] and y₂ = A sin [k (x - ct)] are superposed on a string. The distance between adjacent nodes is ____________.

A stretched string fixed at both ends has 'rrl nodes, then the length of the string will be ______.