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

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 flat curved road on highway has radius of curvature 400 m. A car rounds the curve at a speed of 24 m/s. The minimum value of coefficient of friction to prevent car from sliding is ______.

(take g = 10 m/s²)

A particle rotates in horizontal circle of radius ‘R’ in a conical funnel, with speed ‘V’. The inner surface of the funnel is smooth. The height of the plane of the circle from the vertex of the funnel is ______.

(g = acceleration due to gravity)

A particle executes uniform circular motion with angular momentum 'L'. Its rotational kinetic energy becomes half when the angular frequency is doubled. Its new angular momentum is ______.

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 ______.

The transition from the state n = 4 to n = 3 in a hydrogen like atom results in ultraviolet radiation. Infrared radiation will be obtained in the transition from ______.

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 ______.

For a particle executing SHM the displacement x is given by x = A cos ωt. Identify the graph which represents the variation of potential energy (P.E.) as a function of time t and displacement x.

The period of oscillation of a magnet in a vibration magnetometer is 2 sec. The period of oscillation of a magnet whose magnetic moment is four times that of the first magnet is ______.

A light rod of length 2m suspended from the ceiling horizontally by means of two vertical wires of equal length. A weight W is hung from a light rod as shown in figure.

The rod hung by means of a steel wire of cross-sectional area A₁ = 0.1 cm² and brass wire of cross-sectional area A₂ = 0.2 cm². To have equal stress in both wires, T₁/T₂ = ______.

The two blocks, m = 10 kg and M = 50kg are free to move as shown. The coefficient of static friction between the blocks is 0.5 and there is no friction between M and the ground. A minimum horizontal force F is applied to hold m against M that is equal to ______.

For a particle performing linear S.H.M., its average speed over one oscillation is ______. (a = amplitude of S.H.M., n = frequency of oscillation)