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

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Question 1 of 12

Physics

1. The expression for escape velocity is given by:

ngR

√2gR

ngR²

gR²/2

Question 1 of 12

Question 2 of 12

2. One horse power is given by:

746 KW

746 watts

746 Foot Pounds

746 Joules

Question 2 of 12

Question 3 of 12

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

Parallel

Anti Parallel

None of these

Perpendicular

Question 3 of 12

Question 4 of 12

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

5%

44%

66%

77%

Question 4 of 12

Question 5 of 12

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

Solar Energy

K.E

Elastic P.E

Electrical Energy

Question 5 of 12

Question 6 of 12

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

Become twice its initial value

Become four times, its initial value

Remain constant

Become three times, its initial value

Question 6 of 12

Question 7 of 12

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

4 times

Double

¼ times

Half

Question 7 of 12

Question 8 of 12

8. 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

4.4 Joule

3.2 Joule

3.8 Joule

Question 8 of 12

Question 9 of 12

9. The atmosphere is held to the earth by

Gravity

Wings

Clouds

The rotation of earth

Question 9 of 12

Question 10 of 12

10. 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 10 of 12

Question 11 of 12

11. An example of non-conservative force is:

Frictional force

Electric force

Magnetic force

Gravitational force

Question 11 of 12

Question 12 of 12

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

1:4

1:1

1:2

4:1

Question 12 of 12

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