Punjab 10th Class Physics Chapter 4 Electrostatics Mcqs Test Online

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Question 1 of 20

Physics

1. When a glass rod is rubbed with silk it becomes:

1.Positively charged

2.None of these

3.Negatively charged

4.Becomes neutral

Question 1 of 20

Question 2 of 20

2. Capacitance is defined as:

1.Q/C

2.VC

3.V/Q

4.QV

Question 2 of 20

Question 3 of 20

3. Two uncharged objects A and B are rubbed against each other. When object B is placed near a negatively charged object C, the two objects repel each other. Which of these statements is true about object A?

1.Becomes negatively charged

2.Unpredictable

3.Becomes positively charged

4.Remains uncharged

Question 3 of 20

Question 4 of 20

4. The distance between two point charges is 20 cm. If the distance is reduced to 10 cm, the coulomb force would become:

1.One fourth

2.Four times

3.Half

4.Two times

Question 4 of 20

Question 5 of 20

5. Which is not conductor?

1.Steel

2.Aluminium

3.Sand

4.Copper

Question 5 of 20

Question 6 of 20

6. Which is not insulator?

1.Paper

2.Rubber

3.Mercury

4.Glass

Question 6 of 20

Question 7 of 20

7. A positive and a negative charge are initially 4 cm apart. When they are moved closer together so that they are now only 1cm apart, the force between them is:

1.16 time larger than before

2.8 times larger than before

3.4 times smaller than before

4.4 times larger than before

Question 7 of 20

Question 8 of 20

8. Two charged spheres are separated by 2mm. Which of the following would produce the greatest attractive force?

1.+ 2q and – 2q

2.+ 1q and + 4

3.– 1q and – 4q

4.+ 2q and + 2q

Question 8 of 20

Question 9 of 20

9. Five joules of work is needed to shift 10C of charge from one place to another. The potential difference between the places is:

1.0.5 V

2.10 V

3.2 V

4.5 V

Question 9 of 20

Question 10 of 20

10. Electric field lines

1.Never cross each other

2.Cross each other in the region of weak field

3.Cross each other in the region of strong field

4.Always cross each other

Question 10 of 20

Question 11 of 20

11. Used as dielectric:

1.Mica

2.Paper

3.Glass

4.All of these

Question 11 of 20

Question 12 of 20

12. When positive charge of 2 coulombs is placed at a point in an electric field, it experience a force of 6N. The intensity of electric at this point is:

1.3N C⁻¹

2.61.5N C⁻¹

3.6N C

4.12N C⁻¹

Question 12 of 20

Question 13 of 20

13. When you rub a plastic rod against your hair several times and put it near some bits of paper, the pieces of papers are attracted towards it. What does this observation indicate?

1.The rod and the paper have the same charge

2.The rod acquires a negative charge

3.The rod and the paper are oppositely charged

4.The rod acquires a positive charge

Question 13 of 20

Question 14 of 20

14. An object gains excess negative charge after being rubbed against another object, which is:

1.Negatively charged

2.Positively charged

3.Neutral

4.Either a, b or c

Question 14 of 20

Question 15 of 20

15. Similar charges always:

1.Repel

2.Attract

3.None of these

4.No effect

Question 15 of 20

Question 16 of 20

16. According to Coulomb’s law, what happens to the attraction of two oppositely charged objects as their distance of separation increases?

1.Cannot be determined

2.Decrease

3.Remains unchanged

4.Increase

Question 16 of 20

Question 17 of 20

17. Which is used for tuning a radio?

1.Solenoid

2.Variable capacitor

3.Electroscope

4.Fixed capacitor

Question 17 of 20

Question 18 of 20

18. The Coulomb’s law is valid for the charges which are:

1.Stationary and large size charges

2.Moving and non-point charges

3.Stationary and point charges

4.Moving and point charges

Question 18 of 20

Question 19 of 20

19. The force which is attractive as well as repulsive is:

1.Magnetic force

2.Electromagnetic force

3.Coulomb force

4.Gravitational force

Question 19 of 20

Question 20 of 20

20. A positive electric charge:

1.Repels other positive charge

2.Attract other positive charge

3.Repels a neutral charge

4.Attracts a neutral charge

Question 20 of 20

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