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

Bohr model is applied to a particle of mass 'm' and charge 'q' is moving in a plane under the influence of a transverse magnetic field 'B. The energy of the charged particle in the nth level will be (h = Planck's constant).

Two identical wires of substances 'P' and 'Q ' are subjected to equal stretching force along the length. If the elongation of 'Q' is more than that of 'P', then ______.

For a metallic wire, the ratio of voltage to corresponding current is ______.

The resultant amplitude of two waves y₁ = a sin (ωt + π/6) and y₂ = a cos ωt will be ______

The current in 1 Ω resistor in the following circuit is ______.

The wavelength of the first line in Balmer series in the hydrogen spectrum is 'λ'. What is the wavelength of the second line in the same series?

Mechanical force per unit area of a charged conductor is ______

The displacement of a particle from its mean position (in metre) is given by, y = 0.2 sin(10 πt + 1.5π) cos(10 πt + 1.5π).

The motion of particle is ____________.

The maximum velocity of the photoelectron emitted by the metal surface is 'v '. Charge and mass of the photoelectron is denoted by 'e' and 'm' respectively. The stopping potential in volt is ______.

The maximum velocity of the photoelectron emitted by the metal surface is 'v '. Charge and mass of the photoelectron is denoted by 'e' and 'm' respectively. The stopping potential in volt is ______.

A coil of inductance 'L' is connected to an a.c. source of emf 'E' and frequency 'f'.

The current in the coil is ____________.

For photoelectric emission from certain metal, the cut-off frequency is v. If radiation of frequency 2v impinges on the metal plate, the maximum possible velocity of the emitted electron will be (m is the electron mass) ____________.

With the increase in principal quantum number, the energy difference between the two successive energy levels ____________.

An ideal gas is compressed at a constant temperature. Its internal energy will ____________.

When a light of wavelength 4000 Å falls on a photoelectric emitter, photoelectrons are liberated. For another emitter, light of wavelength 6000 Å is sufficient for photo emission. The work functions of the two emitters are in the ratio of ____________.

In a purely capacitive circuit, the e.m.f. ____________.

The ratio of the velocity of the electron in the first orbit to that in the second orbit is ____________.

Threshold frequency for a metal is 10¹⁵ Hz. Light of `lambda` = 4000 Å falls on its surface. Which of the following statements is correct?

Which of the following statements about the Bohr model of the hydrogen atom is FALSE?

A metal surface is illuminated by light of given intensity and frequency to cause photoemission. If the intensity of illumination is reduced to one-fourth of its original value then the maximum KE of the emitted photoelectrons would be ______.