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

The ratio of densities of nitrogen and oxygen is 14:16. The temperature at which the speed of sound in nitrogen will be the same as that in oxygen at 79°C is ______

The de Broglie wavelength associated with photon is, ____________.

If the monochromatic source in Young's double slit experiment is white light, then ____________.

If the radius of the innermost Bohr orbit is 0.53 Å, the radius of the 4^th orbit is ______

A tube closed at one end and containing air produces fundamental note of frequency 256 Hz. If the tube is open at both ends, the fundamental frequency will be ____________.

A thin transparent sheet is placed in front of a slit in Young's double slit experiment. The fringe width will ____________.

An organ pipe has a fundamental frequency of 120 Hz. Its fourth overtone is 600 Hz. Find the type of the pipe.

The light waves from two independent monochromatic light sources are given by, y₁ = 2 sin ωt and y₂ = 3 cos ωt. Then the correct statement is ____________.

Statement - 1: For practical purpose, the earth is used as a reference at zero potential in electrical circuits.

Statement - 2: The electrical potential of a sphere of radius R with charge Q uniformly distributed on the surface is given by `Q/(4piepsilon_0R)`.

On a rainy day, a small oil film on water shows brilliant colours. This is due to ____________.

If length of a closed organ pipe is 60 cm and velocity of sound is 360 m/s, then the frequency of 1^st overtone is ____________.

When a capacitor connected with coil is completely discharged, then ____________.

Band width for red light of wavelength 6600 Å is 0.42 mm. If red Light is replaced by blue light of wavelength 4400 Å, then the change m bandwidth will be ____________.

The distance between the first and ninth bright fringes formed in a biprism experiment is ______.

(`lambda` = 6000 A, D = 1.0 m, d = 1.2 mm)

According to de-Broglie hypothesis, the wavelength associated with moving electron of mass 'm' is 'λ_e'· Using mass energy relation and Planck's quantum theory, the wavelength associated with photon is  'λ_p'. If the energy (E) of electron and photon is same then relation between 'λ_e' and 'λ_p' is ______.

Two identical light waves having phase difference 'Φ' propagate in same direction. When they superpose, the intensity of the resultant wave is proportional to ______.

A wire of length 'L' and area of cross-section · A' is made of material of Young's modulus 'Y'. It is stretched by an amount 'x'. The work done in stretching the wire is ______.

The magnetic dipole moment of a short magnetic dipole at a distant point along the equator of magnet has a magnitude of 'X' in SI units. If the distance between the point and the magnet is halved then the magnitude of dipole moment will be ______.

In Young's experiment for the interference of light, the separation between the silts is d and the distance of the screen from the slits is D. If D is increased by 0.6% and d is decreased by 0.2%, then for the light of a given wavelength, which one of the following is true?

"The fringe width  ____________."

The frequency of the output signal becomes ____________ times by doubling the value of the capacitance in the LC oscillator circuit.