# MCQ Questions for Class 11 Physics Chapter 5 Laws of Motion with Answers

Here you will find NCERT MCQ Questions for Class 11 Physics with Answers PDF Free Download based on the important concepts and topics given in the textbook as per CBSE new exam pattern. This may assist you to understand and check your knowledge about the chapters. Students also can take a free test of the Multiple Choice Questions of Class 11 Physics. Each question has four options followed by the right answer. These MCQ Questions are selected supported by the newest exam pattern as announced by CBSE.

## Q1. A long solenoid has 1000 turns per metre and carries a current of 1 A. It has a soft iron core of μr = 1000. The core is heated beyond the Curie temperature, Tc .

(a) The H field in the solenoid is (nearly) unchanged but the B field decreases drastically.
(b) The H and B fields in the solenoid are nearly unchanged.
(c) The magnetisation in the core reverses direction.
(d) The magnetisation in the core does not diminishes.

(a) The H field in the solenoid is (nearly) unchanged but the B field decreases drastically.

## Q2. Inertia is the property of a body linked to tendency of a body

a) to resist any change in its state
b) to change the momentum
c) to change its direction
d) to change its position

a) to resist any change in its state

## Q3. Physical independence of force is a consequence of

a) first law of motion
b) third law of motion
c) second law of motion
d) all of these

a) first law of motion

## Q4. A magnetic needle is kept in a non-uniform magnetic field. It experiences

(a) a torque but not a force.
(b) neither a force nor a torque.
(c) a force and a torque.
(d) a force but not a torque.

(c) a force and a torque.

## Q5. The direction of impulse is

a) same as that of the net force
b) opposite to that of the net force
c) same as that of the final velocity
d) same as that of the initial velocity

a) same as that of the net force

## Q6. When a body is stationary

a) the combination of forces acting on it balances each other
b) the body is in vacuum
c) the force acting on it is not in contact with it
d) there is no force acting on it

a) the combination of forces acting on it balances each other

## Q7. When an elevator cabin falls down, the cabin and all the bodies fixed in the cabin are accelerated with respect to

a) man standing on earth
b) ceiling of elevator
c) floor of elevator
d) man standing in the cabin

a) man standing on earth

## Q8 . Curie temperature is the temperature above which

(a) a ferromagnetic material becomes paramagnetic.
(b) a ferromagnetic material becomes diamagnetic.
(c) a paramagnetic material becomes diamagnetic.
(d) a paramagnetic material becomes ferromagnetic.

(a) a ferromagnetic material becomes paramagnetic.

## Q9. If two masses (M & m) are connected on a horizontal plane and a force is applied on the combination, then the tension T depends on

a) whether force is applied on M or m
b) the force applied on the system
c) Can’t be predicted.
d) None of these

a) whether force is applied on M or m

## Q10. Curie law xT = constant, relating magnetic susceptibility (x) and absolute temperature (T) of magnetic substance is obeyed by

(a) all magnetic substances.
(b) paramagnetic substances.
(c) diamagnetic substances.
(d) ferromagnetic substances.

(b) paramagnetic substances.

(a) 1 N
(b) 4 N
(c) 2 N
(d) 8 N

(c) 2 N

(a) 4 N
(b) 10 N
(c) 22 N
(d) 18 N

(a) 4 N

## Q13. Angle of dip is 90° at

(a) poles.
(b) equator.
(c) both at equator and poles.
(d) tropic of cancer.

(a) poles.

## Q14. A passenger in a moving bus is thrown forward when the bus is suddenly stopped. This is explained

(a) by Newtons first law
(b) by Newtons second law
(c) by Newtons third law
(d) by the principle of conservation of momentum

(a) by Newtons first law

## Q15. 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

(a) Gravitational force
(b) real force
(c) fictitious force or pseudo force
(d) frictional force

(c) fictitious force or pseudo force

(a) 10 kg m/s
(b) 7 kg m/s
(c) 2 .5 kg m/s
(d) 3 kg m/s

(a) 10 kg m/s

## Q17. If the magnetising field on a ferromagnetic material is increased, its permeability.

(a) is decreased
(b) is increased
(c) is unaffected
(d) may be increased or decreased.

(d) may be increased or decreased.

## Q18. 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

(a) normal to the surface upwards
(b) normal to the surface downwards
(c) along the direction of the applied force
(d) opposite to the direction of the applied force

(d) opposite to the direction of the applied force

(a) 1 N
(b) 2 N
(c) 3 N
(d) 4 N

(a) 1 N

(a) 19.6 N
(b) 20 N
(c) 30 N
(d) 40 N

(a) 19.6 N

## Class 11 Physics MCQs Questions with Answers Chapter Wise

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