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

A square frame of each side L is dipped in a soap solution and taken out. The force acting on the film formed is _____.
(T = surface tension of soap solution).

A thermodynamic system undergoes cyclic process ABCDA as shown in the figure. The work done by the system is ______

A radioactive substance of half-life 69.3 days is kept in a container. The time in which 80% of the substance will disintegrate will be ______

[take ln(5) = 1.61]

A body of mass 9 kg is under a force that causes displacement in it given by s = `5t^2"/"6` metre where t is time. The work done by the force in 2 seconds is ______

Two small drops of mercury each of radius 'R' coalesce to form a large single drop. The ratio of the total surface energies before and after the change is ____________.

A monoatomic gas of pressure p having volume V expands isothermally to a volume 2V and then adiabatically to a volume 16V. The final pressure of the gas is ____________.

`("ratio of specific heats" = 5/3)`

The rate of radioactive disintegration at an instant for a radioactive sample of half-life 2.2 x 10⁹ s is 10¹⁰ s^-1. The number of radioactive atoms in that sample at that instant is, ______ 

Among the amount of heat absorbed and the amount of work done by a system, ______

Two spherical rain drops reach the surface of the earth with terminal velocities having ratio 16 : 9. The ratio of their surface area is ______.

Water rises upto a height h in a capillary tube on the surface of the earth. The value of h will increase, if the experimental setup is kept in [g = acceleration due to gravity]

If the surface tension of a soap solution is 3 × 10^-2 N/m then the work done in forming a soap film of 20 cm × 5 cm will be ______.

Two coils P and Q are kept near each other. When no current flows through coil P and current increases in coil Q at the rate 10 A/s, the e.m.f. in coil P is 20 mV. When coil Q carries no current and current of 1.6 A flows through coil P, the magnetic flux linked with the coil Q is ____________.

The magnitude of the magnetic induction at a point on the axis at a large distance (r) from the centre of a circular coil of 'n' turns and area 'A' carrying current (l) is given by ______.

The dimensions of self or mutual inductance are given as ______.

A circular coil of wire consisting of 100 turns each of radius 9 cm carries a current of 0.4 A. The magnitude of the magnetic field at the centre of coil is ______. [µ₀ = 12.56 × 10^-7 SI Unit]

The excess of pressure, due to surface tension, on a spherical liquid drop of radius 'R' is proportional to ______.

The natural frequency of an LC circuit is 125 kHz. When the capacitor is totally filled with a dielectric material, the natural frequency decreases by 25 kHz. Dielectric constant of the material is nearly.

In mutual induction, the main current remains same because ____________.

A block of mass 200 g moving in x direction with a constant speed of 30 ms^-1, is subjected to a retarding force F = 0.1x J/m during its travel from x = 10 m to 20 m. Its final KE will be ____________.

In an induction coil, the coefficient of mutual inductance is 6 henry. If a current of 10 ampere in the primary coil is cut-off in `1/1500"s"`, the e.m.f. at the terminals of the secondary coil will be ____________.