Work, Energy and Power MCQ Questions Class 11 Physics Chapter 6 Ans

NCERTCOURSE.COM given here the NCERT chapter-wise Multiple Choice Questions from Class 11 Physics book Chapter 6 Work, Energy and Power with Answers Pdf free download. 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 Work, Energy and Power. 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.

MCQ Class 11 Physics Chapter 6 With Answers

Q1. A pump delivers water at the rate of V cubic meter per second. By what factor its power should be raised so that it delivers water at the rate of nV cubic metre per second.

(i) n³
(ii) √n
(iii) n
(iv) n²

(i) n³

Q2. A body of mass 1 kg travels with a velocity of 10 m/s, this a wall and rebounds. If 50% of its initial energy is wasted as heat, its kinetic energy at the instant of rebounding is

(i) 20 J
(ii) 60 J
(iii) 50 J
(iv) 25 J

(iv) 25 J

Q3. A quantity of work of 1000 J is done in 2 seconds. The power utilised is

(i) 998 W
(ii) 1002 W
(iii) 2000 W
(iv) 500 W

(iv) 500 W

Q4. Which of the following must be known in order to determine the power output of an automobile?

(i) Work performed and elapsed time of work
(ii) Force exerted and distance of motion
(iii) Mass and amount of work performed
(iv) Final velocity and height

(i) Work performed and elapsed time of work

Q5. A ball is dropped from a height of 15 m. It gets embedded in sand by 10 mm and then stops. Which of the following is conserved?

(i) Temperature
(ii) Momentum
(iii) Kinetic energy
(iv) Both (i) and (iii)

(ii) Momentum

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

(i) 998 W
(ii) 1002 W
(iii) 2000 W
(iv) 500 W

(iv) 500 W

Q7. A body of mass 10 kg is travelling with uniform speed of 5 m/s. Its kinetic energy is

(i) 25 J
(ii) 125 J
(iii) 1250 J
(iv) 1000 J

(ii) 125 J

Q8. Work done by a conservative force is positive if

(i) P.E. of the body decreases
(ii) K.E. of the body increases
(iii) K.E. of the body decreases
(iv) P.E. of the body increases

(i) P.E. of the body decreases

Q9. The slope of the kinetic energy versus position vector gives the time rate of change of:

(i) momentum
(ii) force
(iii) work done
(iv) power

(i) momentum

Q10. 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

(i) 100 J
(ii) 392 J
(iii) 60 J
(iv) -100 J

(ii) 392 J

Q11. A body of mass 100 kg falls from a height of 10 m. Its increase in kinetic energy is

(i) 9800 J
(ii) 1000 J
(iii) 5000 J
(iv) 3000 J

(i) 9800 J

Q12. The engine of a vehicle delivers constant power. If the vehicle is moving up the inclined plane then, its velocity

(i) must remain constant
(ii) must increase
(iii) must decrease
(iv) may increase, decrease or remain same

(i) must remain constant

Q13. A body of mass 20 kg falls through a vertical height of 3 m. The work done by the gravitational force is

(i) -588 J
(ii) 588 J
(iii) 60 J
(iv) -60 J

(ii) 588 J

Q14. A man of 60 kg weight is standing at rest on a platform. He jumps up vertically a distance of 1 m and the platform at the same instant moves horizontally forward with the result that the man lands 1 meter behind the point on the platfrom from where the took the jump the total work done by the man at the instant he lands is

(i) 300 J
(ii) 150 J
(iii) 600 J
(iv) zero

(iii) 600 J

Q15. A vehicle is moving with a uniform velocity on a smooth horizontal road, then power delivered by its engine must be

(i) increasing
(ii) zero
(iii) uniform
(iv) decreasing

(i) increasing

Q16. Two masses 1 g and 4 g are moving with equal kinetic energles. The ratio of the magnitudes of their linear momenta is

(i) 4 : 1
(ii) 0 : 1
(iii) 1 : 2
(iv) 1 : 6

(iii) 1 : 2

Q17. 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

(i) 5g J
(ii) 10g J
(iii) Zero
(iv) g J

(iii) Zero

Q18. A light and a heavy body have equal momentum. Which one has greater K.E.?

(i) The lighter body
(ii) The heavier body
(iii) Both have equal K.E.
(iv) Data given is incomplete

(i) The lighter body

I Think the given NCERT MCQ Questions for class 11 Physics book Chapter 6 Work, Energy and Power with Answers Pdf free download will assist you. If you’ve got any queries regarding CBSE Class 11 Physics Work, Energy and Power MCQs Multiple Choice Questions with Answers, drop a comment below and that we will come back to you soon.

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