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

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

Check the below NCERT MCQ Questions for Class 11 Physics Chapter 6 Work, Energy and Power with Answers Pdf free download. MCQ Questions for Class 11 Physics with Answers were prepared based on the latest exam pattern. We have provided Work, Energy and Power Class 11 Physics MCQs Questions with Answers to help students understand the concept very well.

(a) 300 J
(b) 150 J
(c) 600 J
(d) zero

(c) 600 J

(a) 7.2 J
(b) 3.6 J
(c) 120 J
(d) 1200 J

(b) 3.6 J

(a) 100 J
(b) 392 J
(c) 60 J
(d) -100 J

(b) 392 J

(a) 25 J
(b) 125 J
(c) 1250 J
(d) 1000 J

(b) 125 J

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

(d) 0.36 m

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

(d) 500 W

(a) 300
(b) 150
(c) 100
(d) 50

(d) 50

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

(c) Zero

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

(b) 216 J

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

(b) 1 : 2

(a) 490 J
(b) 50 J
(c) 100 J
(d) 300 J

(a) 490 J

(a) 300 J
(b) 150 J
(c) 600 J
(d) zero

(c) 600 J

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

a) The lighter body
b) The heavier body
c) Both have equal K.E.
d) Data given is incomplete

a) The lighter body

a) positive
b) zero
c) negative
d) None of these

a) positive

## 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. The …X… energy V(x) of the spring is said to be zero when block and spring system is in the …Y… position. Here, X and Y refer to

a) potential, equilibrium
b) kinetic, equilibrium
c) mechanical, equilibrium
d) vibrational, left

a) potential, equilibrium

## Q18. Which of the following must be known in order to determine the power output of an automobile?

a) Work performed and elapsed time of work
b) Force exerted and distance of motion
c) Mass and amount of work performed
d) Final velocity and height

a) Work performed and elapsed time of work

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

a) 1200
b) 100
c) 2000
d) 1000

a) 1200

## Q22. The engine of a vehicle delivers constant power. If the vehicle is moving up the inclined plane then, its velocity

a) must remain constant
b) must increase
c) must decrease
d) may increase, decrease or remain same

a) must remain constant