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

Work, Energy and Power Class 11 Physics MCQs Questions 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.

Class 11 Physics Chapter 6 Quiz

Class 11 Physics Chapter 6 MCQ Online Test

You can refer to NCERT Solutions for Class 11 Physics Chapter 6 Work, Energy and Power to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams.

Work, Energy and Power Class 11 Physics MCQ online test

Q1.	When a force of 50 N acts on a body, the body is displaced through a distance of 3 m in a direction normal to the direction of the force. The work done by the force
	A.150 J
	B.1470 J
	C.Zero
	D.-150 J

Ans: Zero

Q2.	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
	A.100 J
	B.392 J
	C.60 J
	D.-100 J

Ans: 392 J

Q3.	A wooden cube having mass 10 kg is dropped from the top of a building . After 1 s, a bullet of mass 20 g fired at it from the ground hits the block with a velocity of 1000 m/s at an angle of 30° to the horizontal moving upwards and gets imbedded in the block . The velocity of the block/bullet system immediately after the collision is
	A.17 m/s
	B.27 m/s
	C.52 m/s
	D.10 m/s

Ans: 17 m/s

Q4.	A body of mass 10 kg is moved parallel to the ground, through a distance of 2 m. The work done against gravitational force is
	A.196 J
	B.-196 J
	C.20 J
	D.zero

Ans: zero

Q5.	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

Ans: 500 W

Q6.	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
	A.20 J
	B.60 J
	C.50 J
	D.25 J

Ans: 25 J

Q7.	A marble moving with some velocity collides perfectly elastically head-on with another marble at rest having mass 1.5 times the mass of the colliding marble. The percentage of kinetic energy by the colliding marble after the collision is
	A.4
	B.25
	C.44
	D.67

Ans: 4

Q8.	A particle of mass m is moving in a horizontal circle of radius r under a centripetal force given by (-kr²) where k is a constant , then
	A.the total energy of the particle is (- k/2r)
	B.the kinetic energy of the particle is (k/r)
	C.the potential energy of the particle is (k/2r)
	D.the kinetic energy of the particle is (- k/r)

Ans: the total energy of the particle is (- k/2r)

Q9.	A sphere of mass m moving with a constant velocity u hits another stationary sphere of the same mass. If e is the coefficient of restitution, then the ratio of velocity of the two spheres after the collision will be
	A.1 – e / 1 + e
	B.1 + e / 1 – e
	C.e + 1 / e – 1
	D.e – 1 / e + 1

Ans: 1 – e / 1 + e

Q10.	Two masses 1 g and 4 g are moving with equal kinetic energles. The ratio of the magnitudes of their linear momenta is
	A.4:1
	B.0:1
	C.1:2
	D.1:6

Ans: 1:2

Q11.	A ball is dropped from a height of 1 m. If the coefficient 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

Ans: 0.36 m

Q12.	A wooden cube having mass 10 kg is dropped from the top of a building. After 1 s, a bullet of mass 20 g fired at it from the ground hits the block with a velocity of 1000 m/s at an angle of 30° to the horizontal moving upwards and gets imbedded in the block. The velocity of the block/bullet system immediately after the collision is
	A.17 m/s
	B.27 m/s
	C.52 m/s
	D.10 m/s

Ans: 17 m/s

Q13.	A bullet fired into a fixed target loses half of its velocity after penetrating 3 cm. How much further will it penetrate before coming to rest assuming that it faces constant resistance to motion?
	A.2.0 cm
	B.3.0 cm
	C.1.0 cm
	D.1.5 cm

Ans: 1.0 cm

Q14.	A body of mass 5 kg is initially at a height of 10 m above the ground. It is then moved to another place 40 m from this position in the same horizontal level. Its increase in potential energy is
	A.200 J
	B.1960 J
	C.Zero
	D.-200 j

Ans: Zero

Q15.	A body of mass 20 kg falls through a vertical height of 3 m. The work done by the gravitational force is
	A.-588 J
	B.588 J
	C.60 J
	D.-60 J

Ans: 588 J

Q16.	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
	A.20 J
	B.60 J
	C.50 J
	D.25 J