Physics Electrostatics Online Mcqs Test

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Question 1

1. In a charged capacitor the energy is stored in the form of

Answer

Magnetic field

Answer

Electric Field

Answer

Gravitational Field

Answer

Nuclear Field

Question 2

2. Relative permittivity of air at one atm is __________ as compared to vacuum.

Question 3

3. The value of the capacitance depends upon the

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Density of the capacitor plates

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Thickness of the capacitor plates

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Voltage applied

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Geometry of the capacitor

Question 4

4. The force between two charges in 8N. Now placed a mica of relativity 4 between two charges as a medium, the force then reduced to

Question 5

5. The electric field is uniform

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Near a negative point charge

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Near a positive point charge

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Between two parallel oppositely charged plates.

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Near a charged plate

Question 6

6. Xerography means

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Wet writing

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None of these

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Type writing

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Dry writing

Question 7

7. The unit of intensity of electric field is

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Newton/coulomb

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Joule/coulomb

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Volt x meter

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Newton/meter

Question 8

8. Selenium is an insulating material when exposed to

Answer

None of these

Answer

Monochromatic light

Question 9

9. Polarization of dielectric between the plates of a parallel plate capacitor ___________ the capacity of the capacitor.

Answer

Neutralizes

Question 10

10. In a charged capacitor the energy resides in

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Gravitational field

Answer

Magnetic field

Answer

Nuclear field

Answer

Electric field

Question 11

11. The ratio of the capacitance of a parallel plate capacitor with an insulating substance as medium between the plates to its capacitance with vacuum (or air) as medium between them is the definition of

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Relative permittivity

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Dielectric constant

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Capacitance

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Dielectric

Question 12

12. Potential difference is the work done is moving unit positive charge form one point to another

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In the direction of electric flux

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In the direction of electric intensity

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Against electric intensity

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In any direction

Question 13

13. Which of the following is the property of electrostatic field lines?

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Electrostatic field lines always start on positive charge and end on negative charges

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The direction of the field at a point is along the tangent to the line of force

Answer

All Choices are

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The number of lines that originate form, or terminate on a charge is proportional to the magnitude of the charge

Question 14

14. The Earth’s potential is considered to be at

Question 15

15. Capacitor is a device used for:

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Storing current

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Storing electric charge

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Producing charges

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Storing voltage

Question 16

16. Electric potential is a

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Null vector

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Scalar Quantity

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Vector quantity

Question 17

17. The map of electric field lines provides the information of electric fields’

Answer

Both A and B

Question 18

18. An electric field lines provides the information about

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Electric force

Answer

All of them

Question 19

19. A point charge in space is attracted towards a dielectric material because of the

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All of above

Answer

Dielectric hysteresis

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Phenomenon of dielectric polarization

Answer

Maximization of electrostatic flux

Question 20

20. An electric dipole is at the center of a hollow sphere of radius r. The total normal electric flux through the sphere is (here Q is the charge and d is the distance between the two charges of the dipole)

Question 21

21. The direction of Electric intensity E is along the

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May be decreasing or increasing

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Decreasing Potential

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Increasing potential

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None of these

Question 22

22. An alpha particle is accelerated through a potential difference of 10⁶ volt. Its kinetic energy will be

Question 23

23. Two charges are placed at a certain distance. If the magnitude of each charge is doubled the force will become

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4 times of its original value

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1/4th of its original value

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1/8th of its original value

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8 times of its original value

Question 24

24. Electric flux linked with a surface will be maximum when

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The surface is held parallel to the electric field

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The surface makes an angle of 45? With the field

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All of the above

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The surface is held perpendicular to the electric field

Question 25

25. An electric force which folds the charges to make atoms and molecules

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Neutral charges

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Negative charges

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Positive charges

Question 26

26. Two similar charges of equal magnitude of one coulomb are placed in vacuum at what distance they will exert force of 9 x 10⁹ N?

Answer

100 meters

Question 27

27. A test charge q is the charge which is

Answer

A point charge

Answer

Very small

Answer

All of these

Question 28

28. If an Area “A” is held perpendicular to the field lines of an electric field of intensity E, the flux through the area is

Question 29

29. In the region of any positive point charge the other positive point charge feels

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Repulsive force

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Attractive force

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Both A and B

Answer

Opposite force

Question 30

30. The number of electrons in one coulomb charge is equal to

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1.6 x 10¯²⁷

Answer

1.6 x 10¹⁹

Answer

6.2 x 10¹⁸

Answer

6.2 x 10²¹

Question 31

31. If a closed surface contains two equal and opposite charges, the net electric flux from the surface is

Answer

None of these

Question 32

32. The electric field lines exerting force on a charge are also known as

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Lines of force

Answer

Force lines

Answer

Both A and B

Answer

Force of lines

Question 33

33. The electric field created by a positive charge is directed

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Radially inward

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Tangentially inward

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Tangentially outward

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Radially outward

Question 34

34. The Sl. Unit of an electric flux is

Question 35

35. The relative permittivity for air at 1 atmospheric pressure is

Question 36

36. Equal charges are given to two spheres of different radii. The potential will

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Depend on the nature of the material of the sphere

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Be more on the smaller sphere

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Be more on the bigger sphere

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Be equal on both the sphere

Question 37

37. In a non-uniform electric field a polar molecule will experience

Answer

Both series and parallel combinations

Answer

Net torque

Question 38

38. Is the Gravitational force is conservation?

Answer

None of these

Question 39

39. In an inkjet printer, the toner drops are

Answer

None of these

Answer

Charged and deflected

Answer

Not charged

Question 40

40. The volt is equal to

Answer

Joule/coulomb

Question 41

41. The constant K in Coulomb’s Law depend upon

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Nature of medium

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System of units

Answer

Intensity of charge

Question 42

42. A point charge Q is placed at the mid-point of a line joining two charges, 4q and q. If the net force on charge q is zero, then Q must be equal to

Question 43

43. The charges are attracted when

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Two charges are opposite

Answer

None of these

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Two charges are alike

Question 44

44. Unit of electric flux density is

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Weber / meter².

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Farad/meter.

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Coulomb/meter².

Question 45

45. Coulomb’s law for the force between electric charges most closely resembles with

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Newton’s law of gravitation.

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Law of conservation of energy.

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Newton’s law of motion.

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Gauss’s theorem.

Question 46

46. Equivalent capacitance is greater than individual capacitances is

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None of these

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Series combination

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Both series and parallel combinations

Answer

Parallel combination

Question 47

47. If the distance between the two point charges become half then force between them becomes

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Remains same

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Four times

Question 48

48. An electron of charge e coulomb passes through a potential difference of V volts. Its energy in ‘joules’ will be

Question 49

49. Capacitor is to have an energy content of 20J it must be placed across a potential difference of

Question 50

50. If mica sheet is placed between the plates of a capacitor the capacity

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Increases then decreases

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Decreases then increases

Question 51

51. Electric field inside a hollow metallic charged sphere i

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Decreasing towards center

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Increasing towards center

Answer

None of these

Question 52

52. Gaussian surface may be

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Rectangular

Answer

None of these

Question 53

53. The electric flux through the surface of a sphere of radius “r” due to a point charge q placed at its center depends upon:

Answer

The quantity of charge outside of the sphere

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The radius of the sphere

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The quantity of charge inside of the sphere

Answer

The surface area of the sphere

Question 54

54. Electric force between two point charges in air or vacuum is F. If we replace air or vacuum by an insulator (dielectric) of relative permittivity Cr the force between the charges will

Answer

Remain constant

Answer

Depends upon composition of dielectric

Question 55

55. Two conductor having the same type of charges are connected by a conducting wire. There would not be any amount of charges on them if

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They have the same shape

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They have the same potential

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They have the same amount of charge

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They have the same capacity

Question 56

56. Force on a charged particle due to an electrostatic field is called:

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Nuclear force

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Magnetic force

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Electrostatic force

Answer

Force of gravity

Question 57

57. Consider a spherical shell of metal at the center of which a positive point charge is kept

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The electric field is zero everywhere

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The electric field is zero outside the shell

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The electric field is zero in the region inside the shell

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The electric field is non-zero in both regions outside and inside the shell

Question 58

58. A capacitor is a perfect insulator for

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Direct current

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Alternating current

Answer

None of these

Answer

Both for the direct and alternating current

Question 59

59. Electric charge of 100? C is 13cm apart from another charge 16.9? C electric force between them is

Answer

9 x 10⁵ N

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9 x 10⁶ N

Answer

9 x 10⁷ N

Question 60

60. At a point, the electric field intensity has

Answer

Two values

Answer

Infinite values

Question 61

61. A cube of metal is given a positive charge Q. For the above system, which of the following statements is true?

Answer

Electric filed is normal to the surface of the cube

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Electric potential at the surface of the cube is zero

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Electric potential within the cube is zero

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Electric field varies within the cube

Question 62

62. Why the toner is given a negative charge to the drum of printer?

Answer

To neutralize writing

Answer

None of these

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To stick the writing

Answer

To spread over the drum

Question 63

63. Two similar charges each of the coulomb placed in air one meter apart repel each other with a force

Answer

9 x 10⁷N

Answer

9.2 x 10⁴N

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9.3 x 10⁹N

Answer

9 x 10⁹N

Question 64

64. The test charge is always a unit

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Negative charge

Answer

None of these

Answer

Positive charge

Answer 169

4(πε₀)¯¹

Answer 170

8μC m¯²

Answer 171

5μC m¯²

Answer 172

20μC m¯²

Answer 173

Remain the same

Answer 174

May increase or decrease

Total Questions:	67
Time Allowed:	30 Minutes
Total Marks:	67
How to Attempt Test:	Please choose the right Option in MCQ-type question.
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Physics Electrostatics Online Mcqs Test

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Important Physics Electrostatics Question and Answer

Physics Electrostatics Practice Test Online With Explanation

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