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

Two waves of wavelength 2 m and 2.02 m, with the same speed superimpose to produce 2 beats per second. The speed of each wave is ____________.

The magnifying power of a telescope is nine. When it is adjusted for parallel rays, the distance between the objective and eyepiece is 20 cm. The focal length of objective and eyepiece are respectively.

Let I₁ and I₂ be the moments of inertia of two bodies of identical geometrical shape. If the first body is made of aluminium and the second of iron, then ____________.

mass is whirled in a circular path with constant angular velocity and its linear velocity is v. If the string is now halved keeping the angular momentum same, the linear velocity is ______.

A body of surface area 15 x 10^-3 m² emits 0.4 kcal in 20 second at a temperature 70° C. The emissive power of the surface at that temperature is ____________.

For formation of beats, two sound notes must have ______.

Earth revolves round the sun in a circular orbit of radius 'R'. The angular momentum of the revolving earth is directly proprtional to ______.

A soap bubble of diameter 4 mm is formed in air. The surface tension of liquid is 15 dyne/cm. The excess pressw·e inside the soap bubble is______.

A set of 25 tuning forks is arranged in order of decreasing frequencies. Each fork produces 3 beats with succeeding one. If the first fork is octave of last, then the frequency of 1st and 15th fork in Hz is ______.

q₁, q₂, q₃ and q₄ are point charges located at points as shown in the figure and S is a spherical gaussian surface of radius R. Which of the following is true according to the Gauss' law?

An electric dipole has a fixed dipole moment `vec "p"`, which makes angle `theta` with respect to x-axis. When subjected to an electric field `vec"E"_1 = "E"hat"i"`, it experiences a torque `vec "T"_1 = tau hat"k"`. When subjected to another electric field `vec "E"_2 = sqrt3 "E"_1  hat "j"` it experiences torque `vec "T"_2 = ~ vec "T"_1` The angle `theta` is ____________.

Two tuning forks have frequencies 380 Hz and 384 Hz respectively. When they are sounded together, maximum sound is heard. How long will it take to hear the minimum sound?

An electron has a mass of 9.1 x 10^-31 kg. It revolves round the nucleus in a circular orbit of radius 0.529 x 10^-10 metre at a speed of 2.2 x 10⁶ m/s. The magnitude of its linear momentum in this motion is ____________.

Select the CORRECT statement.

If a liquid surface is curved, then ____________.

Two spheres 'S₁' and 'S₂' have same radii but temperatures T₁ and T₂ respectively. Their emissive power is same and emissivity is in the ratio 1: 4. Theo the ratio of T₁ to T₂ is ______.

Two spheres 'S₁' and 'S₂' have radii 'R' and '3R', temperature 'T' K and. `"T"/3` K respectively. If 3 they are coated with a material of same emissivity, rate of radiation of 'S₁'  is E then rate of radiation of ' S₂' is ______.

(spheres are of the same material)

The direction of angular momentum of particle is ____________.

If the emissive and absorptive powers of a body are E and A respectively at temperature T, then the emissive power of a blackbody will be ____________.

A set of 56 tuning forks are arranged in series of increasing frequencies. If each fork gives 4 beats with preceding one and the frequency of the last is twice than than that of first, then frequency of the first fork is ____________.

The magnifying power of a telescope is high if its objective and eyepiece have respectively ______.