Physics Chapter 4 Work and Energy Mcqs Test Online Class 11th Punjab

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Question 1 of 12

Physics

1. Two bodies with kinetic energies in the ration of 4:1 are moving with equal linear momentum. The ratio of their masses is

4:1

1:2

1:4

1:1

Question 1 of 12

Question 2 of 12

2. The energy stored in the spring of watch is:

K.E

Solar Energy

Electrical Energy

Elastic P.E

Question 2 of 12

Question 3 of 12

3. If force and displacement of particle in the direction of force are doubled. Work would be

4 times

¼ times

Half

Double

Question 3 of 12

Question 4 of 12

4. If the K.E of a body become four time of the initial value, then new momentum will

Remain constant

Become four times, its initial value

Become twice its initial value

Become three times, its initial value

Question 4 of 12

Question 5 of 12

5. Two bodies of masses m₁ and mn have equal momentum their kinetic energies E₁ and En are in the ratio:

None of these

mnm₁

m₁mn

√m₁ √m₂

Question 5 of 12

Question 6 of 12

6. One horse power is given by:

746 Foot Pounds

746 watts

746 Joules

746 KW

Question 6 of 12

Question 7 of 12

7. An example of non-conservative force is:

Magnetic force

Electric force

Gravitational force

Frictional force

Question 7 of 12

Question 8 of 12

8. The atmosphere is held to the earth by

Gravity

Clouds

The rotation of earth

Wings

Question 8 of 12

Question 9 of 12

9. Work is said to be negative when F and d are:

None of these

Anti Parallel

Perpendicular

Parallel

Question 9 of 12

Question 10 of 12

10. If momentum is increased by 20% then K.E. increases by

5%

44%

77%

66%

Question 10 of 12

Question 11 of 12

11. A body of mass 5kg is moving with a momentum of 10kg ms⁻¹. A force of 0.2 N acts on it in the direction of motion of the body for 10 seconds. The increase in its kinetic energy is

2.8 Joule

3.8 Joule

3.2 Joule

4.4 Joule

Question 11 of 12

Question 12 of 12

12. The expression for escape velocity is given by:

ngR²

gR²/2

ngR

√2gR

Question 12 of 12

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