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Work Energy and Power Class 11 MCQs

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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 of the following is not associated with the UNO?

(A) ILO

(B) WHO

(C) Security Council

(D) ASEAN

Show Answer

Consider 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

The International Court of Justice is located at?

(A) Geneva

(B) Hague

(C) Amsterdam

(D) Vienna

Show Answer

What 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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