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

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 ____________.

In the circuit below, A and B represent two inputs and C represents the output. The circuit represents ______.

The potential energy of a particle executing S.H.M is 2.5 J, when its displacement is half of amplitude. The total energy of the particle is ______.

The region near the junction of an unbiased p-n junction diode is known as depletion layer. The layer is depleted of ______.

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 ______.

Two springs of spring constants 'K' and '2K' are stretched by same force. If 'E₁' and 'E₂' are the potential energies stored in them respectively, then ______.

A particle starts from mean position and performs S.H.M. with period 6 second. At what time its kinetic energy is 50% of total energy?

`(cos45^circ=1/sqrt2)`

A particle performs S.H.M. Its potential energies are 'U₁' and 'U₂' at displacements 'x₁' and 'x₂' respectively. At displacement (x₁ + x₂), its potential energy 'U' is ______.

A particle performs S.H.M. of period 24 s. Three second after passing through the mean position it acquires a velocity of 2 π m/s. Its path length is ______.

`(sin45^circ=cos45^circ=1/sqrt2)`

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)

In a forward bias arrangement of a p-n junction diode, the ______.

A particle starts oscillating simple harmonically from its equilibrium position with time period T. At time t = T/12, the ratio of its kinetic energy to potential energy is ______.

`[sin  pi/3 = cos  pi/6 = sqrt3/2, sin  pi/6 = cos  pi/3 = 1/2]`

At 0.3 V and 0.7 V, the diodes Ge and Si become conductors respectively. In the given figure, if the ends of diode Ge are overturned, the change in potential V₀ will be ______.

A simple harmonic oscillator has amplitude A, angular velocity ω and mass m. Then, average energy in one time period will be ______.

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