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

If the mass of a body is m on the surface of the earth, the mass of the same body on the surface of the moon is ______.

If the angular momentum of an electron is `vec"J"` then the magnitude of the magnetic moment will be ____________.

A drop of water placed between two parallel glass plates which are then pressed together until the water film is 0.01 cm thick. If the area of water in contact with either plate is 5 cm², then the force due to surface tension drawing the plates together is ______.

(S.T. of water is 75 dyne/cm)

Gaussian surface cannot pass through discrete charge because ____________.

A homogeneous disc of mass 2 kg and radius 15 cm is rotating about its axis (which is fixed) with an angular velocity of 4 radian/s. The linear momentum of the disc is ____________.

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 ______.