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

Above the resonance frequency, ____________.

In a parallel plate air capacitor the distance between plates is reduced to one-fourth and the space between them is filled with a dielectric medium of constant 2. If the initial capacity of the capacitor is 4μF then its new capacity is ______.

A parallel plate capacitor is charged and then disconnected from the charging battery. If the plates are now moved farther apart by pulling them by means of insulating handles, then ______.

Two metal plates are separated by 2 cm. The potentials of the plates are -10 V and + 30 V. The electric field between the two plates is ______.

Figure shows plot of charge versus potential difference for four parallel plate capacitors, which have same plate area, dielectric medium but different distance between the plates. Which one of them have smallest plate distance?

The angle of contact at the interface of water glass is 0°, ethyl alcohol-glass is 0°, mercury-glass is 140° and methyl iodide-glass is 30°. A glass capillary is put in a trough containing one of these four liquids. It is observed that the meniscus is convex. The liquid in trough is ____________.

A cyclic process ABCD P is shown in the figure P-V diagram. Which of the following curve represent the same process?

The initial pressure and volume of a gas is 'P' and 'V' respectively. First by isothermal process gas is expanded to volume '9V' and then by adiabatic process its volume is compressed to 'V' then its final pressure is ______. (Ratio of specific heat at constant pressure to constant volume = `3/2`).

If a gas is compressed isothermally then the r.m.s. velocity of the molecules ______.

If 'ΔQ' is the amount of heat supplied to 'n' moles of a diatomic gas at constant pressure, 'Δ U' is the change in internal energy and 'Δ W' is the work done, then Δ W : Δ U : Δ Q is ______.

An ideal gas at 27°C is compressed adiabatically to (8/27) of its original volume. If ratio of specific heats, y = 5/3 then the rise in temperature of the gas is ______.

A glass plate is partly dipped vertically in the mercury and the angle of contact is measured. If the plate is inclined, then the angle of contact will ____________.

A dielectric is inserted between the plates of a charged and isolated parallel-plate air capacitor. Then, the charge on the plates and the potential difference, respectively, ______.

Capacity of a parallel plate capacitor with a medium of dielectric constant 8 is 12 µF. If the medium is removed, then capacity of the capacitor would be ____________.

A water barrel stands on a table of height 'h'. A small hole is made on the wall of barrel at its bottom. If the stream of water coming out of the hole strikes the ground at horizontal distance 'R' from the table, the depth 'd' of water in the barrel is ______.

A capacitor of unknown capacitance is connected across a battery of 'V' volt. The charge stored in it is 'Q' coulomb. When the potential across the capacitor is reduced by 'V' volt, the charge stored in it becomes Q' coulomb. The potential V is ______ 

A parallel plate capacitor has a uniform electric field `overset(->)("E")` in the space between the plates. If the distance between plates is 'd' and the area of each plate is 'A', the energy stored in the capacitor is ______ 

(ε₀ = permittivity of free space)

Four capacitors of equal capacity have an equivalent capacitance C₁ when connected in series and an equivalent capacitance C₂ when connected in parallel. The ratio `c_2/c_1`, is ______

A rectangular block of mass 'm' and cross-sectional area 'A' floats on a liquid of density ρ. If it is given a small vertical displacement from equilibrium, it starts oscillating with frequency 'n' equal to ______.

(g = acceleration due to gravity)

A monoatomic gas at pressure P and volume V is suddenly compressed to one eights of its original volume. The final pressure at constant entropy will be ______.