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One mole of an ideal gas requires 207 J heat to raise the temperature by 10 K, when heated at constant pressure. If the same gas is heated at constant volume to raise the temperature by 10K, then heat required is

One of the two clocks on the earth is controlled by a pendulum and other by a spring. If both the clocks are taken to the moon, then which clock will have the same time – period of the earth?

Real gases show mark able deviation from that of ideal gas behavior at

Atomic and molecular phenomena are dealt with by

The path of a particle is given by the expression y = at + bt², where a and b are constants . Y is the displacement at time t. Its velocity at any instant is given by

The radius of the earth is 6400 km and g = 10 m/s². In order that a body of 5 kg weighs zero at the equator, the angular speed of the earth is

A cyclist goes round a circular path of circumference 343 m in s. The angle made by him, with the vertical is

A body of M.I. 3 kg m² rotating with an angular velocity 2 rad/s has the same K.E. as a mass of 12 kg moving with a velocity of

An ideal gas is that which can

A uniform chain of length 2 m is kept on a table such that a length of 60 cm hangs freely from the edge of the table. The total mass of the chain is 4 kg. What is the work done in pulling the entire chain on the table?

When a compression is incident on rigid wall it is reflected as

If the length of seconds pendulum is increased by 2%, how may seconds it will lose per day?

A boy starts from a point A, travels to a point B at a distance of 3 km from A and returns to A. If he takes two hours to do so, his speed is

At a certain temperature, hydrogen molecules have r.m.s. velocity of 3 km/s. what is the r.m.s velocity of the oxygen molecules at the same temperature?

According to kinetic theory of gases, at absolute zero of temperature
(c) (d)

Electron volt is a unit of

In the case of forced oscillations, which of the following statements is not true?

The good absorber of heat are

Which of the following groups have different dimensions?

The temperatures of inside and outside of a refrigerator are 273 K and 303 K respectively. Assuming, that the refrigerator cycle is reversible, for every joule of work done, the heat delivered to the surrounding will be nearly:

The period of thin magnet is 4 sec. if it is divided into two equal halves then the time period of each part will be

Two wires A and B are of the same length. The diameters are in the ratio 1 : 2 and the Youngs modulus are in ratio 2 : 1. if they are pulled by the same force, then their elongations will be in ratio

The dimensional formula for speed is

The mass of a body which is equal to the ratio of the force acting on a body to the acceleration produced in the body is

The temperature of a piece of metal is raised from 27°C to 51.2°C. the rate at which metal radiates energy increases nearly

A body starts from rest and travels with uniform acceleration a to make a displacement of 6 m. If its velocity after making the displacement is 6 m/s, then its uniform acceleration a is

Two masses 1 g and 4 g are moving with equal kinetic energies. The ratio of the magnitudes of their linear momenta is

In SHM, graph of which of the following is a straight line?

Theory of relativity was discovered by

The aeroplane works on the scientific principle

Following gases are kept at the same temperature. Which gas possesses maximum r.m.s. speed?

A body starts from rest. If it travels with an acceleration of 2 m/s², its displacement at the end of 3 seconds is

The process of heat transfer in which heat is transferred with actual migration of medium particles is known as (AFMC-94)

If the radius of the earth were to be raise by 1% its mass remaining the same, the acceleration due to gravity on the surface of the earth will

The ratio of the change in dimension at right angles to the applied force to the initial dimension is known as

Light year is a unit of

The translational kinetic energy of gas molecules at temperature T for one mole of a gas is

Moment of inertia depends on

Who discovered neutron

In a system of units if force (F), acceleration (A) and time (T) are taken as fundamentals units then the dimensional formula of energy is

The force required to produce an acceleration of 2 m/s² on a mass of 2 kg is

Newtonian mechanics could not explain

A body of mass 5 kg is travelling with a uniform velocity of 2 m/s. Its momentum is

A bullet of mass 25 g moving with a velocity of 200 cm/s is stopped within 5 cm of the target. The average resistance offered by the target is

The time – period of a satellite of earth is 5 hours. If the separation between the earth and the satellite is increased to 4 times the previous value, the new time – period will become

Moon has no atmosphere because

The temperatures of inside and outside of a refrigerator are 273 K and 303 K respectively. Assuming, that the refrigerator cycle is reversible, for every joule of work done, the heat delivered to the surrounding will be nearly:

When the linear momentum of a particle is increased by 1% its kinetic energy increases by x%. When the kinetic energy of the particle is increased by 300%, its linear momentum increases by y%. The ratio of y to x is

A body weighs 500 N on the surface of the earth. How much would it weight half way below the surface of the earth?

The scientists who discovered natural radioactivity belonged to

If a body is rotating about an axis, passing through its centre of mass then its angular momentum is directed along its

A particle performing uniform circular motion has angular momentum L. If its angular frequency is doubled and its kinetic energy halved, then the new angular momentum is

A body of mass 10 kg moving at a height of 2 m, with uniform speed of 2 m/s. Its total energy is

Out of the basic forces , gravitational force

A gun of mass 1000 kg fires a projectile of mass 1 kg with a horizontal velocity of 100 m/s. The velocity of recoil of the gun in the horizontal direction is

A number of small drops of mercury coalesce adiabatically to form a single drop. The temperature of drop

An observer is moving towards a stationary source of frequency 250 Hz with a velocity of 40 m/s. If the velocity of sound is 330 m/s, the apparent frequency heard by the observer will be

A person with dark skin as compared to a person with white skin will experience

Two wires have the same material and length, but their masses are in the ration of 4 : 3. If they are stretched by the same force, their elongations will be in the ratio of

A particle starting from the origin (0, 0) moves in a straight line in the (x, y) plane. Its coordinates at a later time are the path of the particle makes with the x-axis an angle of

A body of mass 20 kg is initially at a height of 3 m above the ground . It is lifted to a height of 2 m from that position. Its increase in potential energy is
(a) 100 J
(b) 392 J
(c) 60 J
(d) -100 J

The total flight requires a time that is?

Absolute error of the measurement is

The masses of two planets are in the ratio 1 : 2. Their radii are in the ratio 1 : 2. The acceleration due to gravity on the planets are in the ratio.

Inside the nucleus, two protons are held together by a force which overcomes the repulsion. This force is called

A body starts from rest and travels for five seconds to make a displacement of 25 m if it has travelled the distance with uniform acceleration a then a is

The physical sciences deal with the study of:

A body of mass 10 kg is travelling with uniform speed of 5 m/s. Its kinetic energy is ?

The height of a liquid in a fine capillary tube

A car sometimes overturns while taking a turn. When it overturns, it is

A spherical ball of mass 10-6 kg hits a wall 1000 times per second normally with a velocity of 1000 m/s and rebounds with same velocity along the initial direction. The force experienced by the wall is

The upper end of wire 1 m long and 2 mm radius is clamped. The lower end is twisted through an angle of 45°. The angle of shear is

Energy is to be carried from one place to another. Which one of the following cannot be used?

If a body of mass m is taken out from a point below the surface of earth equal to half the radius of earth, R, to a height R above the earths surface, then work done on it will be

A dancer on ice spins faster when she folds here arms. This is due to

An engine has an efficiency of 1/6. When the temperature of sink is reduced by 62°C, its efficiency is doubled. Temperature of the source is:

One mole of mono atomic gas (g = 5/3) is mixed with one mole of diatomic gas (g = 7/5) what will be the value of g for the mixture?

The radii of two wires of a same material are in ratio 2 : 1. if the wires are stretched by equal forces, the stress produced in them will be

Water rises up to a height of 5 cm in a capillary tube of radius 2 mm. what is the radius of the radius of the capillary tube if the water rises up to a height of 10 cm in another capillary?

A body of mass 10 kg is initially at a height of 20 m above the ground. It falls to a height of 5 m above the ground. Its potential energy in the new position is

A whistle giving out 450 Hz approaches a stationary observer at a speed of 33 m/s. The frequency heard by the observer in Hz is

The value of g at a particular point is 9.8 m/sec² suppose the earth suddenly shrink uniformly to half its present size without losing any mass. The value of g at the same point (assuming that the distance of the point from the centre of the earth does not shrink) will become

The centripetal component of acceleration arises when?

Two bodies of masses 4 kg and 5 kg are acted upon by the same force. If the acceleration of lighter body is 2 m/s², the acceleration of heavier body is

When angular velocity changes with respect to time then?

A machine gun fires a bullet of mass 40 g with a velocity of 1200 ms-1. The man holding it can exert a maximum force on 144 N on the gum. How many bullets can he fire per second at the most?

The dimensions of kinetic energy is same as that of

String is in fundamental mode of vibration then velocity is directly proportional to _______

A body is projected vertically from the surface of the earth of radius R with velocity equal to half of the escape velocity. The maximum height reached by the body is

The displacement y of a particle executing periodic motion is given by y = 4 cos² (t/2) sin (1000t). This expression may be considered to be a result of superposition of the following number of harmonic motions.

The best ideal black body is

Length of a simple pendulum executing simple harmonic motion is increased by 21%. The percentage increase in the time – period of the pendulum of increased length is

A quantity of work of 1000 J is done in 2 seconds. The power utilised is

Surface tension of a soap solution is 1.9 × 10-2N/m. work done in blowing a bubble of 2.0 cm diameter will be

Energy supplied to convert unit mass of substance from solid to liquid state at its melting point is called

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These MCQs are intended for checking your PhysicsAll Chapters  knowledge!!

for more new questions refresh this page !!

The capacitance of earth, viewed as a spherical conductor of radius 6408 km is:

The magnetic flux (∅) linked with a coil is related to the number of turns (N) of the coil as:

If a certain piece of copper is to be shaped into a conductor of minimum resistance, its length (L) and cross-sectional area (a) shall respectively be :

In parallel resonant circuit:

Increase in frequency deviation results into:

Two conducting spheres of radii r1 and r2 are equally charged. The ratio of their potential is

Rutherford is the unit of:

The dielectric constant of a metal is:

Ferrites may be:

What is the angle of dip at a place where the horizontal component of earth’s magnetic field is equal to the vertical component?

A current carrying power line carries current from west to east. What will be direction of magnetic field 1 meter above it?

EMW are produced by:

AM is used for broadcasting because:

Which of the following is not a unit of magnetic induction?

The density of a nucleus is of the order of:

Siemen is the unit of:

According to Bohr’s theory of hydrogen atom, the radius r of stationary orbit are related to principal quantum number n as:

Quantisation of charge implies:

A magnetic dipole moment is a vector quantity directed from:

For sustained interference, we need two sources which
emit radiations :

The space waves which are affected seriously by atmospheric conditions are:

Two copper spheres of the same radius, one solid and the other hollow, are charged to the same potential. Which will have more charge?

The strength of the magnetic field around an infinite current carrying conductor is :

The amount of work required to increase the distance between -6µC and 4µC from 6 cm to 18 cm will be :

A metal conductor of length 1 m rotates vertically about one of its ends at angular velocity 5 rad s-1 . If the horizontal component of earth’s magnetism is 2 × 10-5 T, then e.m.f. developed between the two ends of the conductor is:

P-decay produces:

The P.E. of an electric dipole is maximum when it makes an angle θ with electric field. The value of θ is :

Circular loop of radius 0.0157 m carries a current 2 A. The magnetic field at the centre of the loop is :

The magnetic flux linked with a coil is inversely proportional to the?

The magnetic field of a given length of a ware for single turn coil at its centre is B. Then. its value for two turns of coil will be :

According to Yukawa’s theory of nuclear forces, the origin of nuclear force between nucleons is due to the exchange of

The graph drawn between V are r for a non-conducting charged solid sphere of radius R for r < R will be :

The force between two parallel wire 2 × 10-7 Nm-1, placed 1 m apart to each other in vacuum. The electric current flowing through the wires is:

Two wires of copper are of the same length but’have different diameters. When they are connected in series across a battery, the heat generated is H1 When connected in parallel across the same battery, the heat generated during the same time is H2 Then :

For germanium crystal, the forbidden energy gap in joules

The resistance of a human body is about:

An EMW of v = 3 MHz passes from vacuum into dielectric medium with permittivity Er = 4, then:

The magnetic field is parallel to a surface, then the magnetic flux through the surface is :

X-rays are:

Millikan’s oil drop experiment makes use of:

Which of the following effects is not shown in alternating current ?

Tangent law is applicable only when:

For ionization of excited Hydrogen atom, the, required energy is:

Ampere’s circuital law was modified by:

The application of Doppler effect are:

Displacement current is always :

In series resonant circuit:

When light travels from one medium to another, which of the following does not change?

Which of the following cannot be polarised?

The area served by an antenna of height 100 m is:

An electron is sent in an electric field of magnitude 9.1 × 106NC-1. The acceleration produced in it is :

The strength of photoelectric current depends upon :

Name the law which states that a varying electric field produces a magnetic field:

Choose the wrong statement?

What happens to the interference pattern the two slits S1 and S2 in Young’s double experiment are illuminated by two independent but identical sources?

The dimensional representation of cu will be :

A transformer is used to light 100 W and 110 V lamp from a 220 V mains. If the main current is 0.5 A. Then the efficiency of the transformer is:

Power factor of an ac circuit is a measure of:

Fg and Fe represents the gravitational and electrostatic force respectively between two electrons situated at some distance the ratio Fg/Fe is if the order of:

An atom stays in an excited state for about:

If two conducting sphere are connected after charging separately then:

A wire of length 2 metre carries a current 1 ampere, is bent to form a circle. The magnetic moment of the coil is :

Choose the wave relevant to telecommunication :

What happens to the magnetic field at the centre of a circular current carrying coil if we double the radius of the coil keeping the current unchanged?

If I current is flowing inductance L, then the dimension of 3/2 LI² is equivalent to:

S.I. unit of flux is :

An electron and a positron each having a mass equivalent to 0.53 MeV annihilate each other and produce a photon. The minimum energy of the photon is.

if an electric dipole is kept in a uniform electric field then resultant electric force on it is :

Electromagnetic waves have a speed of

What is the angle of dip at the magnetic poles ?

The theory of expanding universe is confirmed by the observation of the spectral lines of the star, which shows :

Which of the following is conserved when light waves interfere?

The branch of optics dealing with the formation of images using the concept of straight line propagation of light is called:

Isotones have the same:

Kinetic energy of emitted electrons depends upon :

Twenty seven drops of mercury are charged simultaneously to the same potential of 10 volts. What will be potential if all the charged drops are made to combine to form one large drop ?

Corona discharge takes place:

The length of a half wave dipole at 30 mega-hertz is:

The momentum of an electron that emits a wavelength of 2 Å. will be:

The coupling co-efficient of the perfectly coupled coils is:

Which of the following is blocked by a capacitor ?

The wavelength of a wave of frequency 10 kHz is:

The work function of photoelectric material is 3.3 eV. The threshold frequency will be equal to:

A charge + q is sent through a magnetic field. The force acting on it is maximum w hen the angle between the direction of motion of the charged particle and the magnetic field :

Digital signals:

The neutral point in the magnetic field of a horizontally placed bar magnet is a point where the magnetic field due to that bar magnet is:

When a polaroid is rotated, the intensity of light does not vary. The incident light may be:

Chadwick was awarded the Nobel prize in Physics in 1935 for his discovery of:

Which of the following is not transducer?

Transmutation of nuclei was discovered by:

What is the reason for your answer to the above question?

Half-life of a substance depends on:

The ground state energy of Hydrogen atom is -13.6 eV. What is the potential energy of electron in this state?

A ray of light travelling in air is incident of a glass slab. The ray gets partly reflected and partly refracted. The phase difference between the reflected and the refracted waves is :

If sphere of bad conductor is given charge then it is distributed on:

An iron core transformer with a turns ratio of 8 : 1 has 120 V applied across the primary. The voltage across the

The ratio of specific charge of an alpha particle to the proton is:

Communication channel consists of:

An e and a p are moving parallel to each other in a magnetic field. The magnetic force acting on the p+ is:

The strength of photoelectric current depends upon :

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