R4RIN – MCQs, Mock Tests | NCERT Class 11 MCQ Questions for Class 11 Physics sets 1

The word Science originates from the Latin verb Scientia meaning

1. to know
2. to see
3. to experience
4. to observe

✅ Correct Answer: 1

Atomic and molecular phenomena are dealt with by

1. Newtonian Mechanics
2. fluid Mechanics
3. applied Mechanics
4. Quantum Mechanics

✅ Correct Answer: 4

Wave picture of light failed to explain.

1. the photoelectric effect
2. polarization of light
3. diffraction of light
4. interference of light

✅ Correct Answer: 1

Heliocentric theory proposed by Nicolas Copernicus was

1. replaced by circular orbits to fit the data better
2. replaced by elliptical orbits to fit the data better
3. replaced by elliptical orbits to fit the taste of new rulers of Italy
4. replaced by parabolic orbits to fit the data better

✅ Correct Answer: 2

Just as a new experiment may suggest an alternative theoretical model, a theoretical advance may suggest what to look for in some for in some experiments. Which of the following experiments can be considered to support this claim?

1. Davisson and Germer Experiment
2. experimental discovery of positron
3. scattering of alpha particle or the gold foil experiment
4. Michelson Morley experiment

✅ Correct Answer: 2

The scientific method is

1. a prescribed method for investigating phenomena, acquiring new knowledge…
2. A procedure for proposing new hypothesis
3. a body of techniques for investigating phenomena, acquiring new knowledge…
4. A method for proposing new theories.

✅ Correct Answer: 3

A scientific theory

1. cannot be changed but can be reformulated
2. mong scientisis fixed once and for all because it is logical
3. is changed to suit new fashion ats
4. can be revised if required to fit new phenomenon or data

✅ Correct Answer: 4

Which of the following is a possible first step in applying the scientific method

1. Conducting tests
2. Formulating a hypothesis
3. Formulation of a question
4. Building a theory

✅ Correct Answer: 3

Which of the following is a possible final step in applying the scientific method

1. Formulating a hypothesis
2. Building a theory
3. Analysis of test results
4. Formulation of a question

✅ Correct Answer: 3

Physics is a

1. Applied Science
2. Mathematical Science
3. Engineering Science
4. Natural Science

✅ Correct Answer: 4

Newtonian mechanics could not explain

1. fall of bodies on earth
2. Some of the most basic features of atomic phenomena
3. movement of planets
4. flight of rockets

✅ Correct Answer: 2

Physical quantities are

1. quantities such as degrees, radians and steradians
2. quantities such as length, mass, time, electric current, thermodynamic temperature, amount of substance, and luminous intensity
3. quantities such as pounds, dollars and rupees
4. quantities such as kilos, pounds and gallons

✅ Correct Answer: 2

Which of the following pairs has the same dimensions?

1. specific heat and latent heat
2. lmpulse and momentum
3. surface tension and force
4. moment of lnertia and torque

✅ Correct Answer: 2

The dimensions of kinetic energy is

1. [M 2L2T]
2. [ML 2T]
3. [ML 2T-2]
4. [ML 2T-1]

✅ Correct Answer: 3

A force F is given by F = at + bt², where t is time. What are the dimensions of a and b?

1. MLT-1 and MLT0
2. MLT-3 and ML2T4
3. MLT-4 and MLT1
4. MLT-3 and MLT-4

✅ Correct Answer: 4

The atmospheric pressure is 106 dyne/cm². What is its value in SI unit?

1. 105 newton/m²
2. 106 newton/m²
3. 104 newton/m²
4. 103 newton/m²

✅ Correct Answer: 1

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

1. FA2T
2. FAT2
3. FA2T
4. FAT

✅ Correct Answer: 2

If force (F), work (W) and velocity (v) are taken as fundamental quantities. What is the dimensional formula of time (T)?

1. [WFv]
2. [WFv-1]
3. [W-1F -1v]
4. [WF-1v -1]

✅ Correct Answer: 3

The dimensions of kinetic energy is same as that of

1. force
2. pressure
3. work
4. momentum

✅ Correct Answer: 3

Which of the following groups have different dimensions?

1. Potential difference, EMF, voltage
2. Pressure, stress, Youngs modulus
3. Heat, energy, work done
4. Dipole moment, electric flux, electric field

✅ Correct Answer: 4

ML-1T -2 is the dimensional formula of

1. magnetic induction
2. self-inductance
3. electric potential
4. electric field

✅ Correct Answer: 1

What is the dimensional formula of magnetic field?

1. MT-2A-1
2. MT-1A-2
3. M-1L-2TA-1
4. M-1LTA-2

✅ Correct Answer: 1

Electron volt is a unit of

1. charge
2. potential difference
3. energy
4. magnetic force

✅ Correct Answer: 3

The volume of a cube in m³ is equal to the surface area of the cube in m². The volume of the cube is

1. 64 m³
2. 216 m³
3. 512 m³
4. 196 m³

✅ Correct Answer: 2

In SI system the fundamental units are

1. meter, kilogram, second, ampere, Kelvin, mole and candela
2. meter, kilogram, second, coulomb, Kelvin, mole and candela
3. meter, Newton, second, ampere, Kelvin, mole and candela
4. meter, kilogram, second, ampere, Kelvin, mole and lux

✅ Correct Answer: 2

Which one of the following represents the correct dimensions of the coefficient of viscosity?

1. [ML-1T-2]
2. [MLT-1]
3. [ML-1T-1]
4. [ML-2T-2]

✅ Correct Answer: 3

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

1. 300
2. 450
3. 600
4. 0

✅ Correct Answer: 3

Absolute error of the measurement is

1. the difference between the individual measurement and the true value of the quantity cubed.
2. the difference between the individual measurement and the true value of the quantit y squared.
3. the difference between two individual measurements and their mean
4. the difference between the individual measurement and the true value of the quantity

✅ Correct Answer: 1

Which of the following units denotes the dimensions [ML2/Q2], where Q represents the electric charge?

1. Wb/m²
2. Henry(H)
3. H/m²
4. Weber(Wb)

✅ Correct Answer: 2

The displacement in metres of a body varies with time t in second as y = t2 – t – 2. The displacement is zero for a positive of t equal to

1. 1 s
2. 2 s
3. 3 s
4. 4 s

✅ Correct Answer: 2

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

1. 3 km/h
2. zero
3. 2 km/h
4. 1.5 km/h

✅ Correct Answer: 1

A 180 metre long train is moving due north at a speed of 25 m/s. A small bird is flying due south, a little above the train, with a speed of 5 m/s. The time taken by the bird to cross the train is

1. 10 s
2. 12 s
3. 9 s
4. 6 s

✅ Correct Answer: 4

A boy starts from a point A, travels to a point B at a distance of 1.5 km and returns to A. If he takes one hour to do so, his average velocity is

1. 3 km/h
2. zero
3. 1.5 km/h
4. 2 km/h

✅ Correct Answer: 2

A body starts from rest and travels with uniform acceleration on a straight line. If its velocity after making a displacement of 32 m is 8 m/s, its acceleration is

1. 1 m/s²
2. 2 m/s²
3. 3 m/s²
4. 4 m/s²

✅ Correct Answer: 1

Which one of the following is the unit of velocity?

1. kilogram
2. metre
3. m/s
4. second

✅ Correct Answer: 3

A body starts from rest and travels for t second with uniform acceleration of 2 m/s². If the displacement made by it is 16 m, the time of travel t is

1. 4 s
2. 3 s
3. 6 s
4. 8 s

✅ Correct Answer: 1

The dimensional formula for speed is

1. T-1
2. LT-1
3. L-1T-1
4. L-1T

✅ Correct Answer: 2

The dimensional formula for velocity is

1. [LT]
2. [LT-1]
3. [L2T]
4. [L-1T]

✅ Correct Answer: 2

A body starts from rest and travels with an acceleration of 2 m/s². After t seconds its velocity is 10 m/s . Then t is

1. 10 s
2. 5 s
3. 20 s
4. 6 s

✅ Correct Answer: 2

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

1. 9 m
2. 12 m
3. 16 m
4. 10 m

✅ Correct Answer: 1

A body starts from rest and travels with uniform acceleration of 2 m/s². If its velocity is v after making a displacement of 9 m, then v is

1. 8 m/s
2. 6 m/s
3. 10 m/s
4. 4 m/s

✅ Correct Answer: 2

A body starts from rest and travels with an acceleration of 2 m/s². After t seconds its velocity is 10 m/s. Then t is

1. 10 s
2. 5 s
3. 20 s
4. 6 s

✅ Correct Answer: 2

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

1. 3 m/s²
2. 4 m/s²
3. 2 m/s²
4. 1 m/s²

✅ Correct Answer: 3

A boy moves on a circular distance of radius R. Starting from a point A he moves to a point B which is on the other end of the diameter AB. The ratio of the distance travelled to the displacement made by him is

1. ∏/2
2. ∏
3. 2∏
4. 4∏

✅ Correct Answer: 1

The dimensional formula for acceleration is

1. [LT2]
2. [LT?2]
3. [L2T]
4. [L2T2]

✅ Correct Answer: 2

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

1. 6 m/s²
2. 2 m/s²
3. 3 m/s²
4. 4 m/s²

✅ Correct Answer: 3

The angular velocity depends upon the rate of change of the?

1. Angular acceleration
2. Angular Distance.
3. Angular Displacement
4. torque

✅ Correct Answer: 3

A small body attached at the end of an inextensible string completes a vertical circle, then its

1. angular momentum remains constant
2. linear momentum remains constant
3. angular velocity remains constant
4. total mechanical energy remains constant

✅ Correct Answer: 4

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

1. 440
2. 420
3. 430
4. 450

✅ Correct Answer: 4

A body makes a displacement of 4 m due East from a point O and then makes displacement of 3 m due North. Its resultant displacement from O

1. 7 m
2. 1 m
3. 5 m
4. 1 . 2 m

✅ Correct Answer: 3

A body is traveling in a circle at constant speed. It

1. has an inward acceleration
2. has constant velocity.
3. has no acceleration
4. has an outward radial acceleration

✅ Correct Answer: 1

When a body P moves on a circular path, the centripetal acceleration is

1. directed inwards from P, to the centre of the circle
2. directed tangential to the circumference of the circle, at P
3. directed perpendicular to the planc of the circle, at P
4. directed outward, perpendicular to the circumference of the circle

✅ Correct Answer: 1

A coin kept on a rotating gramophone disc just begins to slip if its centre is at a distance of 8 cm from the centre of the disc. The angular velocity of the gramophone disc is then doubled. Through what distance, the coin should be shifted towards the centre, so that the coin will just slip?

1. 2 cm
2. 6 cm
3. 16 cm
4. 4 cm

✅ Correct Answer: 1

A can filled with water is revolved in a vertical circle of radius 4 metre and the water does not fall down. The time period of revolution will be

1. 4 sec
2. 10 sec
3. 8 sec
4. 1 sec

✅ Correct Answer: 1

When angular velocity changes with respect to time then?

1. an angular acceleration is produced
2. a linear acceleration is produced
3. it constitute a couple
4. a linear velocity is produced

✅ Correct Answer: 1

The total flight requires a time that is?

1. four times the time necessary to reach the maximum height.
2. thrice the time necessary to reach the maximum height
3. equal to the time necessary to reach the maximum height.
4. twice the time necessary to reach the maximum height

✅ Correct Answer: 4

The path followed by a projectile is called its?

1. Territory
2. Treasury
3. Tractor
4. Trajectory

✅ Correct Answer: 4

One radian is defined to be the angle subtended where the arc length S is exactly equal to the?

1. radius of the circle.
2. diameter of the circle.
3. circumference of the circle.
4. half of radius of the circle.

✅ Correct Answer: 1

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

1. the inner wheel which leaves the ground first
2. either inner wheel or the outer wheel leaves the ground
3. both the wheel leave the ground simultaneously
4. the outer wheel which leaves the ground first

✅ Correct Answer: 1

A body travels along the circumference of a circle of radius 2 m with a linear velocity of 6 m/s . Then its angular velocity is

1. 6 rad /s
2. 3 rad /s
3. 2 rad / s
4. 4 rad / s

✅ Correct Answer: 2

The centripetal component of acceleration arises when?

1. The direction of motion is changed.
2. The direction propagation is changed.
3. The direction of gravity is changed
4. The direction of projectile is changed

✅ Correct Answer: 1

The word centripetal is derived from two Greek words meaning?

1. Seeking the situation.
2. Seeking the centre.
3. Touching the centre.
4. Leaving the centre.

✅ Correct Answer: 2

A car is moving with a speed of 30 m/s on a circular path of radius 500 m. Its speed is increasing at the rate of 2 m/s². The acceleration of the car is

1. 2 m/s²
2. 9.8 m/s ²
3. 1.8 m/2
4. 2.7 m/s²

✅ Correct Answer: 4

One radian is equal to?

1. 57.7o
2. 53.7o
3. 59.3o
4. 57.3o

✅ Correct Answer: 4

A body is moving along a circle with an increasing speed. It possesses?

1. centripetal acceleration only (ac)
2. tangential acceleration only (ar)
3. both tangential and centripetal acceleration (ar and ac)
4. No acceleration

✅ Correct Answer: 3

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

1. a + 2bt
2. zero
3. 2bt
4. at

✅ Correct Answer: 1

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

1. the gravitational mass
2. the electromagnetic mass
3. the internal mass
4. the inertial mass

✅ Correct Answer: 4

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

1. 1 N
2. 4 N
3. 2 N
4. 8 N

✅ Correct Answer: 3

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?

1. one
2. four
3. two
4. three

✅ Correct Answer: 4

A passenger in a moving bus is thrown forward when the bus is suddenly stopped. This is explained

1. by Newtons first law
2. by Newtons second law
3. by Newtons third law
4. by the principle of conservation of momentum

✅ Correct Answer: 1

A passenger sitting in a bus moving at uniform speed, feels pushed backward whenever the bus is accelerated forward. This type of force is called

1. Gravitational force
2. real force
3. fictitious force or pseudo force
4. frictional force

✅ Correct Answer: 3

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

1. 10 kg m/s
2. 7 kg m/s
3. 2 .5 kg m/s
4. 3 kg m/s

✅ Correct Answer: 1

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

1. gravitational force
2. electrostatic force
3. weak force
4. strong force

✅ Correct Answer: 4

A block of wood is placed on a surface. A force is applied parallel to the surface to move the body. The frictional force developed acts

1. normal to the surface upwards
2. normal to the surface downwards
3. along the direction of the applied force
4. opposite to the direction of the applied force

✅ Correct Answer: 4

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

1. 1 N
2. 2 N
3. 3 N
4. 4 N

✅ Correct Answer: 1

The mass of a body is 2 kg. It weight is

1. 19.6 N
2. 20 N
3. 30 N
4. 40 N

✅ Correct Answer: 1

A body is sliding down a rough inclined plane which makes an angle of 30 degree with the horizontal. If the coeffcient of friction is 0.26, the acceleration in m/s² is

1. 1.95
2. 2.78
3. 3.47
4. 4.6

✅ Correct Answer: 2

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

1. 5 m/s
2. 0.1 m/s
3. 15 m/s
4. 20 m/s

✅ Correct Answer: 2

A block of mass 2 kg rests on a rough inclined plane making an angle of 30 degree with the horizontal. The coefficient of static friction between he block and the plane is 0.7. The frictional force on the block is

1. 9.8 N
2. 0.7 × 9.8 × √3 N
3. 9.8 × √3 N
4. 0.7 × 9.8 N

✅ Correct Answer: 4

A particle of mass 0.3 kg is subjected to a force F = -kx with k = 15 N/m. What will be its initial acceleration if it is released from a point 20 cm away from the origin?

1. 15 m/s²
2. 3 m/s²
3. 10 m/s²
4. 5 m/s²

✅ Correct Answer: 3

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

1. 1 m/s²
2. 1.2 m/s²
3. 1.6 m/s²
4. 1.8 m/s²

✅ Correct Answer: 3

Out of the basic forces , gravitational force

1. ranks first in strength
2. ranks second in strength
3. ranks third in strength
4. ranks fourth in strength

✅ Correct Answer: 4

The frame of reference attached to a satellite of the earth is

1. an inertial frame
2. an absolute frame at rest with respect to the stars
3. a non – inertial frame
4. a gravitational frame

✅ Correct Answer: 3