Physics all Chapters Combined Mock test to Score 90+ in MHTCET Exam – 02

The ratio of angular speed of a second-hand to the hour-hand of a watch is

A liquid drop having surface energy ‘E’ is spread into 512 droplets of same size. The final surface energy of the droplets is

With an increase in temperature, surface tension of a liquid (except molten cadmium and copper)

When an ideal monatomic gas is heated at constant pressure, fraction of heat energy supplied which increases the internal energy of gas, is

A die atomic gas (ϒ = 1.4) does 300 J work when it is expanded isobarically. The heat given to the gas in this process is

The efficiency of an ideal heat engine working between the freezing point and boiling point of a water, is

A given sample of an ideal gas occupies a volume V at a pressure P and absolute temperature T. The mass of each molecule of the gas is m. Which of the following gives the density of the gas?

R.M.S. velocity of oxygen molecules at N.T.P is 0.5 km/s. The R.M.S velocity for the hydrogen molecule at N.T.P is

Increase in temperature of a gas filled in a container would lead to:

A particle is executing S.H.M. of periodic time ‘T‘. The time taken by a particle in moving from mean position to half the maximum displacement is (sin 30o = 0.5)

A body of mass m is attached to the lower end of a spring whose upper end is fixed. The spring has negligible mass. When the mass m is slightly pulled down and released, it oscillates with a time period of
3 s. When the mass m is increased by 1 kg, the time period of oscillations become 5 s The value of m in kg is

A thin bar magnet oscillates with a time period T. If it is cut into equal pieces along its axis, time period of oscillation of each piece is

A pipe closed at one end has length 83 centimetre the number of possible natural oscillations of air column whose frequencies lie below 1000 HZ are (velocity of sound in air = 332 m/s)

The fundamental frequency of a closed organ pipe of length 20 cm is equal to the second overtone for an organ pipe open at both the ends . The length of organ open at both the ends is

A string is vibrating in its fifth overtone between two rigid supports 2.4 m apart. The distance between successive node and antinode is

Wavefront is the locus of all points, where the particles of the medium vibrate with the same

According to Huygens principle during refraction of light from air to a denser medium

The polarizing angle of glass is 57 degree. A ray of light which is incident at this angle will have an angle of refraction as

The ratio of intensities of two waves is 9 : 1. They are producing interface. The ratio of maximum and minimum intensities will be

A metal sphere of 25 cm radius carries a charge of 65 nC, absolute potential is

The resistances in left and right gap of a meter bridge are 20 Ω and 30 Ω respectively when the resistance in the left gap is reduced to half its value the balance point shifts by

In potentiometer experiment, null point is obtained at a particular point for a cell on potentiometer wire x cm long. If the length of the potentiometer wire is increased without changing the cell, the balancing
length will (Deriving source not changed)

A charged particle is released from rest in a region of study and uniform electric and magnetic fields which are parallel to each other. The particle will move in a

Two current carrying coils has radii r and 2r and have same magnetic induction at their centres. the ratio of voltage applied across them

A bar magnet of magnetic moment 20 J/T lies allied with the direction of a uniform magnetic field of 0.25 T. The amount of work required to turn the magnet so as to align its magnetic movement normal to the field direction is

A thin bar magnet oscillates with a time period T. If it is cut into two equal pieces along its axis, time period of oscillation of each piece is

The magnetic susceptibility is negative for

A multimeter reads a voltage of a certain A.C. source as 100 V. What is the peak value of voltage of A.C. source?

When inductance of 1 Henry is connected to 200 volts, 50 Hz source, the maximum value of the current is

The LC parallel resonant circuit

The minimum energy required to eject an electron from the metal surface is called

The maximum kinetic energy of the photo electrons depends only on

If E and p are the energy and the momentum of a photon respectively, then on reducing the wavelength of photon

In a photo electric experiment, if both d intensity and frequency of the incident light are doubled, then the saturation photo electric current

The ratio of wavelengths of the last line of Balmer series and the last line of Lyman series is

When an electron in hydrogen atom revolves in stationary orbit, it

Half-life of a radioactive substance is 20 minutes. Difference between points of time when it is 33% disintegrated and 67% disintegrated is approximately

In common base circuit of a transistor, current amplification factor is 0.95. Calculate the emitter current if base current is 0.2 mA

LED constructed by Silicon carbide, Zinc selenide emit radiation of ______