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

mnm₁

√m₁ √m₂

None of these

m₁mn

Question 2 of 12

Question 3 of 12

3. One horse power is given by:

746 Foot Pounds

746 KW

746 Joules

746 watts

Question 3 of 12

Question 4 of 12

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

4 times

¼ times

Double

Half

Question 4 of 12

Question 5 of 12

5. 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

3.8 Joule

2.8 Joule

4.4 Joule

3.2 Joule

Question 5 of 12

Question 6 of 12

6. The atmosphere is held to the earth by

Wings

Gravity

Clouds

The rotation of earth

Question 6 of 12

Question 7 of 12

7. The expression for escape velocity is given by:

gR²/2

ngR²

√2gR

ngR

Question 7 of 12

Question 8 of 12

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

66%

77%

44%

5%

Question 8 of 12

Question 9 of 12

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

Remain constant

Become three times, its initial value

Become four times, its initial value

Become twice its initial value

Question 9 of 12

Question 10 of 12

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

Parallel

Anti Parallel

Perpendicular

None of these

Question 10 of 12

Question 11 of 12

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

Solar Energy

Elastic P.E

K.E

Electrical Energy

Question 11 of 12

Question 12 of 12

12. An example of non-conservative force is:

Electric force

Magnetic force

Gravitational force

Frictional force

Question 12 of 12

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