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

Three masses 700 g, 500 g, and 400 g are suspended at the end of a spring and are in equilibrium as shown in figure. When the 700 g mass is removed, the system oscillates with a period of 3 seconds; when the 500 g mass is also removed, it will oscillate with a period of ____________.

A stretched string of 1 m length and mass 5 x 10^-4 kg is having tension of 20 N. If it is plucked at 25 cm from one end then it will vibrate with frequency ____________.

For the stationary wave,

y = 8sin(6.25πx) cos(96πt) metre, the distance between a node and the next antinode is ____________.

A container has a mixture of two gases, hydrogen, and oxygen at room temperature. Which one of the following statements is true, if V_H and V_O are the root mean square velocities of hydrogen and oxygen molecules respectively?

For stationary waves in the medium, ____________.

The equation of S.H.M. of a particle of amplitude 4 cm performing 150 oscillations per minute starting with an initial phase 30° is ____________.

Electronic configuration of germanium is 2, 8, 18 and 4. To make it extrinsic semiconductor small quantity of antimony is added. The correct statement is ____________.

Glass has refractive index μ with respect to air and the critical angle for a ray of light going from glass to air is θ. If a ray of light is incident from air on the glass with angle of incidence θ corresponding angle of refraction is ______.

The stopping potential of the photoelectrons, from a photo cell is ______.

The refractive index of the material of crystal is 1.68 and that of castor oil is 1.2. When a ray of light passes from oil to glass, its velocity will change by a factor ______.

The amplitude of sound is doubled and the frequency is reduced to one fourth. The intensity of sound at the same point will be ____________.

lf the length of a stretched string is shortened by 40 % and the tension is increased by 44%, then the ratio of the final and initial fundamental frequencies are ____________.

The equation of a stationary wave is given by 2 sin `((pi"x")/15) "cos" (48 pi"t").`The distance between a node and its next antinode is ____________.

The rms speed of oxygen molecule in a gas is u, If the temperature is doubled and the molecules dissociates into two atoms, the rms speed will be ______.

A body of mass 1 kg is suspended from a spring of negligible mass. Another body of mass 500 g moving vertically upwards hits the suspended body with a velocity 3 ms^-1 and gets embedded in it. If the frequency of oscillation of the system of the two bodies after collision `10/pi` Hz, the amplitude of motion and the spring constant are respectively ____________.

The wave described by y = 0.35 sin (27πt - 10πx), where x and y are in metre and tin second, is a wave travelling along the ______.

Three identical coils X, Y and Z are placed with their planes parallel to each other. Coils X and Z carry current as shown in the figure. Coils X and Y are fixed and coil Z is moved towards Y, then ______.

Ratio of pressures exerted by two gases is 4 : 3 and their densities are in the ratio 3 : 4. The ratio of their R.M.S. velocities is ____________.

The temperature at which the molecules of nitrogen will have the same r.m.s. velocity as the molecules of oxygen at 327° C is ____________.

A loop of flexible conducting wire lies in a magnetic field of 4.0 T with its plane perpendicular to the field. The length of the wire is 1 m. When a current of 2.2 A is passed through the loop, it opens into a circle, then the tension developed in the wire is ____________.