Work Energy and Power Class 11 MCQs. We covered all the Work Energy and Power Class 11 MCQs in this post for free so that you can practice well for the exam.
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Mock Test on Work Energy and Power for Class 11 Students
A car is moving at a high speed. Which energy does it possess?
(a) Kinetic energy
(b) Potential energy
(c) Frictional force
(d) Gravitational force
Option a – Kinetic energy
An object of mass 20 kg is moving with a uniform velocity of 5 ms 1. What is the kinetic energy possessed by it?
(a) 350 J
(b) 150 J
(c) 200 J
(d) 250 J
Option d – 250 J
Which State of India experiences the maximum annual variation of rainfall?
(A) Meghalaya
(B) Kerala
(C) Rajasthan
(D) West Bengal
Show AnswerConsider the following statements. I. There is no net moment on a body that is in equilibrium. II. The momentum of a body is always conserved. III. The kinetic energy of an object is always conserved. Which of the statements (s) given above is/are correct?
(a) Only I
(b) II and III
(c) I and II
(d) All of the above
Option c – I and II
A raised hammer possesses
(a) kinetic energy
(b) mechanical energy
(c) muscular energy
(d) potential energy
Option d – potential energy
Pakyong Airport is located in?
(A) Sikkim
(B) Jammu and Kashmir
(C) Arunachal Pradesh
(D) Mizoram
Show AnswerWhat does the Kinetic Energy (KE) of a moving body depend upon?
(a) Weight and its position
(b) Mass and its position
(c) Mass and velocity
(d) Mass and acceleration
Option c – Mass and velocity
How is the kinetic energy of a moving object affected if the net work done on it is positive?
(a) Decreases
(b) Increases
(c) Remains constant
(d) Becomes zero
Option b – Increases
Assertion (A) Work done by friction on a body sliding down an inclined plane is positive. Reason (R) Work done is greater than zero if the angle between force and displacement is acute. Codes
(a) Both A and R are true and R is the correct explanation of A
(b) Both A and R are true, but R is not the correct explanation of A
(c) A is true, but R is false
(d) A is false, but R is true
Option d – A is false, but R is true
An example of the conservative force is
(a) friction force
(b) gravitational force
(c) viscous force
(d) None of these
Option b – gravitational force
Which one of the following forces is non-central and non-conservative?
(a) Frictional force
(b) Electric force
(c) Gravitational force
(d) Mechanical force
Option a – Frictional force
The energy of a body is
(a) its capacity of doing work.
(b) a scalar quantity.
(c) rate of doing work.
(d) Both (a) and (b)
Option d – Both (a) and (b)
Example of non-conventional sources of energy is
(a) Geothermal energy
(b) Nuclear energy
(c) Wind energy
(d) Both (a) and (b)
Option d – Both (a) and (b)
Which one of the following is not a form of stored energy?
(a) Nuclear energy
(b) Potential energy
(c) Electrical energy
(d) Chemical energy
Option a – Nuclear energy
Mechanical energy is the sum of
(a) kinetic energy + potential energy
(b) chemical energy + electrical energy
(c) potential energy + heat energy
(d) kinetic energy + heat energy
Option a – kinetic energy + potential energy
The SI unit of mechanical energy is
(a) joule
(b) watt
(c) newton-second
(d) joule-second
Option a – joule
The work done by a force is equal to the
(a) scalar product of the force and another displacement.
(b) scalar product of the force and the velocity.
(c) scalar product of the mass and the velocity.
(d) scalar product of the mass and acceleration.
Option a – scalar product of the force and another displacement
A man pushes a wall and fails to displace it. He does
(a) negative work
(b) positive but not maximum work
(c) no work at all
(d) maximum work
Option c – no work at all
If a body is whirled in a circle the work done on it ………
(a) is negative
(b) is zero
(c) cannot be determined
(d) is positive
Option b – is zero
When a body is made to slide over a rough horizontal surface, the work done by the frictional force is
(a) positive
(b) negative
(c) zero
(d) may be positive and negative
Option b – negative
When a body falls freely under gravity then the work done by gravity is
(a) Positive
(b) Negative
(c) Zero
(d) Infinity
Option a – Positive
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