MCQ Questions for Class 11 Physics Chapter 6 Work, Energy and Power with Answers

Leave a Comment / By / January 25, 2022

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. The north pole of a bar magnet is rapidly introduced into a solenoid at one end (say A). Which of the following statements correctly depicts the phenomenon taking place?

(a) No induced emf is developed.
(b) The end A of the solenoid behaves like a south pole.
(c) The end A of the solenoid behaves like north pole.
(d) The end A of the solenoid acquires positive potential.

(c) The end A of the solenoid behaves like north pole.

Q2. Identify the wrong statement.

(a) Eddy currents are produced in a steady magnetic field.
(b) Eddy currents can be minimized by using laminated core.
(c) Induction furnace uses eddy current to produce heat.
(d) Eddy current can be used to produce braking force in moving trains.

(a) Eddy currents are produced in a steady magnetic field.

Q3. Which of the following does not use the application of eddy current?

(a) Electric power meters
(b) Induction furnace
(c) LED lights
(d) Magnetic brakes in trains

(c) LED lights

Q4. If number of turns in primary and secondary coils is increased to two times each, the mutual inductance

(a) becomes 4 times
(b) becomes 2 times
(c) becomes A times
(d) remains unchanged 4

(a) becomes 4 times

Q5. A ball is dropped from a height of 1 m. If the coeffcient of restitution between the surface and ball is 0.6, the ball rebounds to a height of

(a) 0.6 m
(b) 0.4 m
(c) 1 m
(d) 0.36 m

(d) 0.36 m

Q6. A quantity of work of 1000 J is done in 2 seconds. The power utilised is

(a) 998 W
(b) 1002 W
(c) 2000 W
(d) 500 W

(d) 500 W

Q7. 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) 300
(b) 150
(c) 100
(d) 50

(d) 50

Q8. A solid cylinder of length 1 m and diameter of cross section y 100 cms is first placed with its axis vertical its then slowly inclined till its axis is horizontal. The loss in its potential energy if the mass of the cylinder is 10 kg is

(a) 5g J
(b) 10g J
(c) Zero
(d) g J

(c) Zero

Q9. A body of mass 10 kg moving at a height of 2 m, with uniform speed of 2 m/s. Its total energy is

(a) 316 J
(b) 216 J
(c) 116 J
(d) 392 J

(b) 216 J

Q10. Two masses 1 g and 4 g are moving with equal kinetic energies. The ratio of the magnitudes of their linear momenta is

(a) 4 : 1
(b) 1 : 2
(c) 0 : 1
(d) 1 : 6

(b) 1 : 2

Q11. 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) 490 J
(b) 50 J
(c) 100 J
(d) 300 J

(a) 490 J

Q12. The north pole of a bar magnet is rapidly introduced into a solenoid at one end (say A). Which of the following statements correctly depicts the phenomenon taking place?

(a) No induced emf is developed.
(b) The end A of the solenoid behaves like a south pole.
(c) The end A of the solenoid behaves like north pole.
(d) The end A of the solenoid acquires positive potential.

(c) The end A of the solenoid behaves like north pole.

Q13. According to work-energy theorem, the work done by the net force on a particle is equal to the change in its

a) kinetic energy
b) angular momentum
c) linear momentum
d) potential energy

a) kinetic energy

Q14. When the rate of change oic current is unity, the induced emf is equal to

(a) thickness of coil
(b) number of turns in coil
(c) coefficient of self inductance
(d) total flux linked with coil

(c) coefficient of self inductance

Q15. Two inductors of inductance .L each are connected in series with opposite? magnetic fluxes. The resultant inductance is
(Ignore mutual inductance)

(a) zero
(b) L
(c) 2L
(d) 3L

(c) 2L

Q16. Work done by a conservative force is positive if

a) P.E. of the body decreases
b) K.E. of the body increases
c) K.E. of the body decreases
d) P.E. of the body increases

a) P.E. of the body decreases

Q17. Which of the following statements is not correct?

(a) Whenever the amount of magnetic flux linked with a circuit changes, an emf is induced in circuit.
(b) The induced emf lasts so long as the change in magnetic flux continues.
(c) The direction of induced emf is given by Lenz’s law.
(d) Lenz’s law is a consequence of the law of conservation of momentum.

(d) Lenz’s law is a consequence of the law of conservation of momentum.

Q18. There is a uniform magnetic field directed perpendicular and into the plane of the paper. An irregular shaped conducting loop is slowly changing into a circular loop in the plane of the paper. Then

(a) current is induced in the loop in the anti-clockwise direction.
(b) current is induced in the loop in the clockwise direction.
(c) ac is induced in the loop.
(d) no current is induced in the loop.

(a) current is induced in the loop in the anti-clockwise direction.

Q19. A vehicle is moving with a uniform velocity on a smooth horizontal road, then power delivered by its engine must be

a) increasing
b) zero
c) uniform
d) decreasing

a) increasing

Q20. A body projected vertically from the earth reaches a height equal to earth’s radius before returning to the earth. The power exerted by the gravitational force is greatest

a) at the instant just before the body hits the earth
b) at the highest position of the body
c) it remains constant all through
d) at the instant just after the body is projected

a) at the instant just before the body hits the earth

Class 11 Physics MCQs Questions with Answers Chapter Wise

Practicing NCERT Physics MCQs With Answers Pdf Class 11 is one of the best ways to prepare for the CBSE Class 11 board exam. There is no substitute for consistent practice whether one wants to understand a concept thoroughly or one wants to score better. If you have any queries regarding The CBSE Class 11 Physics MCQs Multiple Choice Questions with Answers, drop a comment below and we will get back to you soon.

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