 Check the below Online Education 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.

## Online Education for Work, Energy and Power Class 11 MCQs Questions with Answers

Work Energy And Power Class 11 MCQ Question 1.
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
(a) 300 J
(b) 150 J
(c) 600 J
(d) zero

Answer: (c) 600 J

Class 11 Physics Chapter 6 MCQ Question 2.
A uniform chain of length 2 m is kept on a table such that a length of 60 cm hangs freely from the edge of the table. The total mass of the chain is 4 kg. What is the work done in pulling the entire chain on the table?
(a) 7.2 J
(b) 3.6 J
(c) 120 J
(d) 1200 J

Answer: (b) 3.6 J

MCQ Questions For Class 11 Physics Chapter 6 Question 3.
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

Answer: (b) 392 J

MCQ On Work Power And Energy Class 11 Question 4.
A body of mass 10 kg is travelling with uniform speed of 5 m/s. Its kinetic energy is
(a) 25 J
(b) 125 J
(c) 1250 J
(d) 1000 J

Answer: (b) 125 J

Work Power And Energy Class 11 MCQ Question 5.
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

Answer: (d) 0.36 m

Work Energy And Power Class 11 MCQs Pdf Question 6.
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

Answer: (d) 500 W

Class 11 Work Energy And Power MCQs Question 7.
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

MCQ Of Work Energy And Power Class 11 Question 8.
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

Class 11 Physics Work Energy And Power MCQ Question 9.
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

Answer: (b) 216 J

Ch 6 Physics Class 11 MCQ Question 10.
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

Answer: (b) 1 : 2

Class 11 Physics Ch 6 MCQ Question 11.
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

Answer: (a) 490 J

Class 11 Physics Chapter 6 MCQ With Answers Question 12.
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
(a) 300 J
(b) 150 J
(c) 600 J
(d) zero

Answer: (c) 600 J

Chapter 6 Physics Class 11 MCQs Question 13.
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

Work Energy Power Class 11 MCQ Question 14.
A body of mass 100 kg falls from a height of 10 m. Its increase in kinetic energy is
(a) 9800 J
(b) 1000 J
(c) 5000 J
(d) 3000 J

Answer: (a) 9800 J

Work Power Energy MCQ Class 11 Question 15.
An isolated particle of mass m is moving in a horizontal plane (x-y), along the x-axis, at a certain height above the ground. It suddenly explodes into two fragments of masses m/4 and 3m/4 . An instant later, the smaller fragment is at y = + 15 cm. The larger fragment at this instant is at
(a) y = -5 cm
(b) y = +20 cm
(c) y = +5 cm
(d) y = -20 cm

Answer: (a) y = -5 cm

Question 16.
A uniform chain of length 2 m is kept on a table such that a length of 60 cm hangs freely from the edge of the table. The total mass of the chain is 4 kg. What is the work done in pulling the entire chain on the table?
(a) 7.2 J
(b) 3.6 J
(c) 120 J
(d) 1200 J

Answer: (b) 3.6 J

Question 17.
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

Answer: (b) 392 J

Question 18.
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

Question 19.
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

Answer: (d) 0.36 m

Question 20.
An electric heater of rating 1000 W is used for 5 hrs per day for 20 days. The electrical energy utilised is
(a) 150 kWh
(b) 200 kWh
(c) 100 kWh
(d) 300 kWh