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

Which of the following transition will have highest emission frequency?

If two waves represented by `"y"_1 = 3  "sin" omega "t"` and `"y"_2 = 5  "sin" (omega "t" + pi/3)` interfere at a point, then the amplitude of the resulting wave will be about ____________.

The acceleration due to gravity on a planet is 1.96 m/s². If it is safe to jump from a height of 3 m on tbe earth, the corresponding height on the planet will be ____________.

In a double slit experiment, the separation between the slits is d and distance of screen from slits is D. If the wavelength of light used is `lambda` and I is the intensity of central bright fringe, then intensity at distance x from central maximum is given by ____________.

Two identical light sources s₁ and s₂ emit light of same wavelength `lambda`. These light rays will exhibit interference if their ______.

The energy (in eV) required to excite an electron from n = 2 to n = 4 state in hydrogen atom is ____________.

We have a sample of gas characterised by P, V, and T and another sample of gas characterized by 2P, V/4, and 2T. What is the ratio of the number of molecules in the first and second samples?

`phi  "and"  phi_2  (phi_1 > phi_2)` are the work functions of metals A and B. When light of same wavelength is incident on A and B, the fastest emitted electrons from A are ____________ those emitted from B.

The depth 'd' below the surface of the earth at which acceleration due to gravity becomes `(g/n)` is ______.

R = radius of the earth, 'g' = acceleration due to gravity, n = integer

The acceleration due to gravity on moon is `(1/6)^"th"` times the acceleration due to gravity on earth. If the ratio of the density of earth 'ρ_e' to the density of moon 'ρ_m' is `5/3`, then the radius of moon 'R_m' in terms of the radius of earth 'R_e' is ______.

When the value of acceleration due to gravity 'g' becomes `(g/3)` above the earth's surface at height 'h' then relation between 'h' and 'R' is ______.

R =radius of the earth

The radius of the earth is. 6400 km and that of mars is 3200 km. The mass of the earth is about 10 times the mass of mars. Weight of the object on the earth is 200 N. What will be its weight on the mars?

At a height R above the earth's surface, the gravitational acceleration is ______.

(R = radius of earth, g = acceleration due to gravity on earth's surface.)

Two monoatomic ideal gases A and B of molecular masses 'm₁' and 'm₂' respectively, are enclosed in separate containers kept at the same temperature. The ratio of the speed of sound in gas A to that in gas B is given by ______.

A train blowing the whistle moves with a constant velocity 'V' away from an observer standing on the platform. The ratio of the natural frequency of the whistle 'n' to the apparent frequency is 1.2 : 1. If the train is at rest and the observer moves away from it at the same velocity 'V', the ratio of 'n' to the apparent frequency is ______.

A transverse wave is travelling on a string with velocity 'V'. The extension in the string is 'x'. If the string is extended by 50%, the speed of the wave along the string will be nearly ______.

(Hooke's law is obeyed)

A wire AB is carrying steady current 'I₁' and is kept on the table. Another wire CD carrying current 'I₂' is held parallel and directly above AB at a distance 'r'. When wire CD is left free and it remains suspended at its position, its mass per unit length is (g =acceleration due to gravity) ____________.

A body of mass 10 kg is attached to a wire 0.3 m long. Its breaking stress is 4.8 × 10⁷ N/m². The area of cross-section of the wire is 10^-6m². The maximum angular velocity with which it can be rotated 111 a horizontal circle is ______.

In the case of conical pendulum, if T is the tension in the string and θ is the semivertical angle of cone, then the component of tension which balances the centrifugal force in equilibrium position is ______.

A motorcyclist rides in a horizontal circle about central vertical axis inside a cylindrical chamber of radius 'r'. If the coefficient of friction between the tyres and the inner surface of chamber is 'µ', the minimum speed of motorcyclist to prevent him from skidding is ______.

('g' =acceleration due to gravity)