Physics Electrostatics Online Mcqs Test

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Question 1

1. A capacitor is a perfect insulator for

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Alternating current

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Direct current

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Both for the direct and alternating current

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None of these

Question 2

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

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Maximization of electrostatic flux

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All of above

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Dielectric hysteresis

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Phenomenon of dielectric polarization

Question 3

3. At a point, the electric field intensity has

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Infinite values

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Two values

Question 4

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

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The quantity of charge inside of the sphere

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The quantity of charge outside of the sphere

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The surface area of the sphere

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The radius of the sphere

Question 5

5. 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 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

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The electric field is zero everywhere

Question 6

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

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Attractive force

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Both A and B

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Opposite force

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Repulsive force

Question 7

7. 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 8

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

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Be equal on both the sphere

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Be more on the bigger sphere

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Depend on the nature of the material of the sphere

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Be more on the smaller sphere

Question 9

9. Is the Gravitational force is conservation?

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None of these

Question 10

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

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Electrostatic force

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Nuclear force

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Force of gravity

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Magnetic force

Question 11

11. The test charge is always a unit

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Positive charge

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None of these

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Negative charge

Question 12

12. Selenium is an insulating material when exposed to

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Monochromatic light

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None of these

Question 13

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

Question 14

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

Question 15

15. Equivalent capacitance is greater than individual capacitances is

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Both series and parallel combinations

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Series combination

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Parallel combination

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None of these

Question 16

16. 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 17

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

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9 x 10⁶ N

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9 x 10⁵ N

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9 x 10⁷ N

Question 18

18. The value of the capacitance depends upon the

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Thickness of the capacitor plates

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Geometry of the capacitor

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Voltage applied

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Density of the capacitor plates

Question 19

19. The unit of intensity of electric field is

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Joule/coulomb

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Newton/coulomb

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Newton/meter

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Volt x meter

Question 20

20. 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 any direction

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Against electric intensity

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In the direction of electric intensity

Question 21

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

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Newton’s law of motion.

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Gauss’s theorem.

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Law of conservation of energy.

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Newton’s law of gravitation.

Question 22

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

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1/8th of its original value

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4 times of its original value

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1/4th of its original value

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8 times of its original value

Question 23

23. 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 24

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

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Both series and parallel combinations

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Net torque

Question 25

25. Electric field inside a hollow metallic charged sphere i

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Decreasing towards center

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None of these

Answer

Increasing towards center

Question 26

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

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Negative charges

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Positive charges

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Neutral charges

Question 27

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

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Both A and B

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Force of lines

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Force lines

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Lines of force

Question 28

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

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

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

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

Answer

All Choices are

Question 29

29. An electric field lines provides the information about

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All of them

Answer

Electric force

Question 30

30. Electric potential is a

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Vector quantity

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Scalar Quantity

Answer

Null vector

Question 31

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

Answer

Neutralizes

Question 32

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

Answer

To neutralize writing

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None of these

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To spread over the drum

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To stick the writing

Question 33

33. Flux coming out from a unit positive charge placed in air is

Answer

4(πε₀)¯¹

Question 34

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

Question 35

35. 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 36

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

Answer

None of these

Question 37

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

Question 38

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

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Radially outward

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Tangentially inward

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Radially inward

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Tangentially outward

Question 39

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

Question 40

40. Capacitor is a device used for:

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Producing charges

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Storing electric charge

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Storing voltage

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Storing current

Question 41

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

Answer

9 x 10⁷N

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9.2 x 10⁴N

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9.3 x 10⁹N

Answer

9 x 10⁹N

Question 42

42. 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 43

43. The direction of Electric intensity E is along the

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May be decreasing or increasing

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None of these

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Increasing potential

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Decreasing Potential

Question 44

44. The Sl. Unit of an electric flux is

Question 45

45. In a charged capacitor the energy resides in

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Electric field

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Nuclear field

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Gravitational field

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Magnetic field

Question 46

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

Question 47

47. 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 is held perpendicular 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

Question 48

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

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Both A and B

Question 49

49. The volt is equal to

Answer

Joule/coulomb

Question 50

50. Xerography means

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Dry writing

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Wet writing

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Type writing

Answer

None of these

Question 51

51. 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

Answer

Dielectric constant

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Dielectric

Answer

Relative permittivity

Answer

Capacitance

Question 52

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

Answer

1.6 x 10¹⁹

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6.2 x 10²¹

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6.2 x 10¹⁸

Answer

1.6 x 10¯²⁷

Question 53

53. In an inkjet printer, the toner drops are

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Charged and deflected

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None of these

Answer

Not charged

Question 54

54. The electric field is uniform

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Between two parallel oppositely charged plates.

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Near a positive point charge

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Near a charged plate

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Near a negative point charge

Question 55

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

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Decreases then increases

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Increases then decreases

Question 56

56. If the distance of separation between two chares is increased, the electrical potential energy of the system will

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Remain the same

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May increase or decrease

Question 57

57. 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

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Depends upon composition of dielectric

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Remain constant

Question 58

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

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Nature of medium

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Intensity of charge

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System of units

Question 59

59. Unit of electric flux density is

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Weber / meter².

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Coulomb/meter².

Answer

Farad/meter.

Question 60

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

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Electric field varies within the cube

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Electric potential at the surface of the cube is zero

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Electric filed is normal to the surface of the cube

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Electric potential within the cube is zero

Question 61

61. 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 62

62. A test charge q is the charge which is

Answer

A point charge

Answer

All of these

Answer

Very small

Question 63

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

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Gravitational Field

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Electric Field

Answer

Nuclear Field

Answer

Magnetic field

Question 64

64. A hollow insulated conduction sphere is given a positive charge of 10μC. What will be the electric field at the center of the sphere if its radius is 2 meters?

Answer

5μC m¯²

Answer

20μC m¯²

Answer

8μC m¯²

Answer 166

They have the same potential

Answer 167

They have the same capacity

Answer 168

They have the same amount of charge

Answer 169

They have the same shape

Answer 170

Rectangular

Answer 171

None of these

Answer 172

Two charges are opposite

Answer 173

Two charges are alike

Answer 174

None of these

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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