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

Three long, straight and parallel wires carrying currents are arranged as shown in figure. The force experienced by 10 cm length of wire Q is ____________.

The velocity of water in river is 8 km/hr of the upper surface. The river is 12 m deep. If the coefficient of viscosity of water is 10^-2 poise then the shearing stress between horizontal layers of water is ______.

If 'f' is the number of degrees of freedom of a molecule of a gas and ratio of molar specific heats of a gas, ϒ = 1 + `2/"f"` where ϒ = Cp/Cv. The ratio of 'ϒ' for monoatomic gas to 'ϒ' for (rigid) f diatomic gas is ______.

A piece of lead weighing 500 g gives out 1200 calories of heat when it is cooled from 100° C to 20° C. Find its specific heat.

Magnetic flux of 12 microweber is linked with a coil. When current of 3 mA flows through it, the self inductance of the coil is ____________.

An office room contains about 4000 moles of air. The change in the internal energy of this much air when it is cooled from 34° C to 19° C at a constant pressure of 1.0 atm is (Use `gamma_"air"` = 1.4 and Universal gas constant = 8.314 J / mol K) ____________.

A coil of self-inductance L is connected in series with a bulb B and an AC source. Brightness of the bulb decreases when ____________.

A graph of magnetic flux `phi` versus current (I) is shown for four inductors A, B, C, D. Smaller value of self inductance is for inductor ____________.

A resistance of 100 `Omega`, inductor of self-inductance`(4/pi^2)` H and a capacitor of unknown capacitance are connected in series to an a.c. source of 200 V and 50 Hz. When the current and voltage are in phase, the capacitance and power dissipated is respectively ____________.

A graph of magnetic flux `(phi)` versus current (I) is shown for four inductors A, B, C and D. Larger value of self-inductance is for inductor ____________.

On supplying 100 µC of charge to a conductor, its potential rises by 5 V then capacity of the conductor is ______.

The molar specific heat of an ideal gas at constant pressure and constant volume is 'C_p' and 'C_v' respectively. If 'R' is the universal gas constant and the ratio 'C_p' to 'C_v' is 'γ' then C_V = ______.

The ratio of the specific heats `c_"p"/c_"v"=gamma` in terms of degrees of freedom 'n' is given by ______.

The molar specific heats of an ideal gas at constant pressure and volume are denoted by C_p and C_v, respectively. If `gamma = "C"_"p"/"C"_"v"` and R is the universal gas constant, then C_v is equal to ______.

A stretched wire 60 cm long is vibrating with its fundamental frequency of 256 Hz. If the length of the wire is decreased to 15 cm and the tension remains the same. Then the fundamental freuqency of the vibration of the wire will be ______.

The inductance of a solenoid L having diameter d. Let n be the number of turns per unit length. The inductance per unit length near the middle of a solenoid is ______.

(Assume that, l = current passes through the turns, µ₀ = Permeability of vacuum)

A particle executing SHM has velocities v₁ and v₂ at distances x₁ and x₂ respectively, from the mean position. Its time period is ______.

In Young's double slit experiment if two slightly different wavelengths are present in the light used, then ______.

For a gas, `"R"/"C"_"v"=0.4`, where R Is universal gas constant and C_v is the molar specific heat at constant volume. The gas is made up of molecules, which are ______

The mass of the earth is 81 times the mass of the moon and the distance between their centres is R. The distance from the centre of the earth, where gravitational force will be zero is ______.