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

A light of frequency 'v' is incident on the metal surface whose threshold frequency is 'v₀'. If v = v₀, then [c = speed of light in medium] ____________.

The earth moves around the sun in an elliptical orbit as shown in the figure. The ratio, `"OA"/"OB"` = x. The ratio of the speed of the earth at Band at A is ______.

In experiment of photoelectric effect, the stopping potential for incident yellow light of wavelength 5890 Å is 4 volt. If the yellow light is replaced by blue light of wavelength 4000 Å, the stopping potential is ____________.

When the work function of a metal increases, maximum kinetic energy of emitted photoelectrons ____________.

Which one of the following graphs represents the variation of photoelectric current (i) with intensity (I) of the incident light?

The graph between restoring force and time in case of S.H.M is ______.

A capacitor C₁ = 4µF is connected is series with another capacitor C₂ = 1µF. The combination is connected across d.c. source of 200 V. The ratio of potential across C₂ to that across C₁ is ______.

In the circuit shown, the potential difference across the 4.5 µF capacitor is ______.

The critical angle for light travelling from medium P to medium Q is 'θ'. The speed of light in medium P is 'v'. Then the speed of light in medium Q is ______.

Choose the correct statement.

In case of insulators, ______.

A particle executes simple harmonic motion with amplitude 'A' and period 'T'. If it is halfway between mean position and extreme position, then its speed at that point is ______.

In amplitude modulation ______.

Two sources of equal e.m.f are connected to an external resistance R in series. The internal resistance of the two sources are R₁ and R₂ (R₂ > R₁) If the potential difference across the source having internal. resistance R₂ is zero, then ______.

Two planets A and B of equal mass are having their period of revolutions T_A and T_B such that T_A = 2T_B. These planets are revolving in the circular orbits of radii r_A and r_B respectively. Which out of the following would be the correct relationship of their orbits?

Potential energy as a function of r is given by U =  `"A"/"r"^10-"B"/"r"^5`, where r is the interatomic distance, A and B are positive constants. The equilibrium distance between the two atoms will be ______.

The equation of a particle executing simple harmonic motion is given by x = sin π `("t" + 1/3)` m. At t = 1s, the speed of particle will be ______. (Given π = 3.14)

A player stops a football weighting 0.5 kg which comes flying towards him with a velocity of 10m/s. If the impact lasts for 1/50th sec. and the ball bounces back with a velocity of 15 m/s, then the average force involved is ______.

Two simple harmonic motions are represented by the equations y₁ = 0.1 sin `(100pi"t"+pi/3)` and y₁ = 0.1 cos πt.

The phase difference of the velocity of particle 1 with respect to the velocity of particle 2 is ______.

For a given photosensitive material and frequency (> threshold frequency) of incident radiation, the photoelectric current varies with the intensity of incident light as:

A particle is executing simple harmonic motion with amplitude A. When the ratio of its kinetic energy to the potential energy is `1/4`, its displacement from its mean position is ______.