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

A particle performs linear SHM at a particular instant, velocity of the particle is 'u' and acceleration is a while at another instant velocity is 'v' and acceleration is 'β (0 < α < β). The distance between the two position is ______.

In potentiometer experiment, null point is obtained at a particular point for a cell on potentiometer wire x cm long. If the length of the potentiometer wire is increased without changing the cell, the balancing length will ______. (Driving source is not changed) 

When an electron in hydrogen atom revolves in stationary orbit, it ______.

In balanced meter bridge, the resistance of bridge wire is 0.1 Ω cm. Unknown resistance X is connected in left gap and 6 Ω in right gap, null point divides the wire in the ratio 2:3. Find the current drawn from the battery of 5 V having negligible resistance.

Light of wavelength λ, which is less than threshold wavelength is incident on a photosensitive material. If incident wavelength is decreased so that emitted photoelectrons are moving with same velocity, then stopping potential will ______.

The L-C parallel resonant circuit ______.

The following graphs show the variation of stopping potential corresponding to the frequency of incident radiation (ν) for a given metal. The correct variation is shown in graph [ν₀ = threshold frequency].

An ammeter of resistance R gives a full-scale deflection when a current of 2 A passes through it. If it is measured with a maximum current of 10 A, the required shunt is ______.

In an L-C-R series circuit, if the angular frequency is gradually increased, then match the following columns.

A simple pendulum with a bob of mass m and conducting wire of length L swings under gravity through an angle θ. The component of the earth's magnetic field in the direction perpendicular to the swing is B. Maximum emf induced across the pendulum is ______.

(g = acceleration due to gravity)

When an AC source is connected across a pure capacitor, the correct phase relation between current (i_c) and voltage (e_c) is shown in the figure.

(A)	(B)	(C)	(D)

Light of two different frequencies whose photons have energies 1.3 eV and 2.8 eV respectively, successfully illuminate a metallic surface whose work function is 0.8 eV. The ratio of maximum speeds of emitted electrons will be ______.

Photoelectric emission is observed from a metallic surface for frequencies ν₁ and ν₂ of the incident light rays (ν₁ > ν₂). If the ratio of the maximum value of the kinetic energy of the photoelectrons emitted in the first case to that in the second case is 2 : K, then the threshold frequency of the metallic surface is ______.

The triply ionised beryllium (Be⁺⁺⁺) has the same electron orbital radius as that of the ground state of the hydrogen atom. The energy state (n) of triply ionised beryllium is ______.

(Z for beryllium = 4)

The orbital frequency of an electron in the hydrogen atom ______.

The increase in internal energy of 1 kg of water at 100°c when it is converted into steam at the same temperature and at 1 atmospheric pressure will be ______.

(density of steam is 0.6 kg m^-3, latent heat of vaporisation of water = 2.25 × 10⁶ J kg^-1).

The photoelectric threshold for a certain metal surface is 3600 Å. If the metal surface is irradiated by a wavelength of 1100 Å, then kinetic energy of the emitted photoelectrons is ______.

The speed of an electron in ground state energy level is 2.6 × 10⁶ ms^-1, then its speed in third excited state will be ______.

Which of the following graph represents the impedance Z of the L-C-R series resonant combination?

In figure, a particle is placed at the highest point A of a smooth sphere of radius r. It is given slight push and it leaves the sphere at B, at a depth h vertically below A, such that h is equal to ______.