Physics - Electrostatics

Physics - Electrostatics

1. The region or the space around a charge in which other charge can feel its electrostatic effect is called:

a) Electric charge
b) Electro-magnetic field
c) Electric current
d) Electric field
2. Electrostatics is the branch of physics which deals with the charges:

a) In motion
b) At rest
c) Neutral particles
d) Suspended
3. Solid bodies are charged due to the transfer of protons

a) False
b) True
4. If the distance between two charged bodies is much greater as compared to their size, then the bodies are considered as

a) Electrons
b) Atoms
c) Neutral paricles
d) Point charges
5. The value of Coulombs constant depends upon the nature of the:

a) Charges
b) Force of repulsion between the charges only
c) Medium between the charge bodies
d) Force of attraction between the charges only
6. The nucleus of an atom consists of protons and :

a) Beta partices
b) Electrons
c) Alpha particles
d) Neutrons
7. The capacity of a capacitor whose potential difference is 12 volt when 10 micro coulomb charge is stored in it:

a) 12 micro farad
b) 0.83 micro farad
c) 0.5 farad
d) 120 farad
8. Volt is the unit of:

a) Current
b) Potential difference
c) Capacitance
d) Power
9. The units of coulombs constant is:

a) N-meter
b) N /Coulb
c) N.Coulb / m2
d) N.m 2 / coul 2
10. The instrument used for detecting and testing the nature of charges is called:

a) Microscope
b) Magnetic coil
c) Telescope
d) Electroscope
11. To increase the value of capacitance the capacitors should be connected in:

a) Series
b) Parallel
c) Both a & b are applicable
d) None of these
12. The potential difference between two points is given by the expression:

a) V = Work / Q
b) Work = V Q
c) W = V/Q
d) V = Work x Q
13. The direction of the elctric intensity in an electric field is given by:

a) Electric charge
b) Potential difference
c) Electric lines of force
d) Electric intensity
14. If the amount of charge stored in a capacitor is 50 coulb and the P.D is 5 volts then the capacity is:

a) 20 farad
b) 100 farad
c) 10 farad
d) None of these
15. Mica is used in between the plates of a capacitor it is called as:

a) Free space
b) Dielectric
c) Connection
d) None of these
16. Force experienced by unit charge at a point in the fieldis called as:

a) Electric power
b) Electric field intensity
c) Potential difference
d) None of these
17. The electrical instrument which is used to store charge or electrical energy is:

a) Galvanometer
b) Mica capacitor
c) Capacitor
d) Electroscope
18. The distance beween two point charges is 10 cm if the distance is reduced to 5 cm the force between would become:

a) 100 N
b) 25 N
c) 4 N
d) 0.04 N
19. According to the property of series combination of capacitors, the amount of charge stored in each capacitor is:

a) Different
b) Increases from capacitor to capacitor
c) All are applicable
d) Same
20. The value of electric intensity at a point is 10 N / C and charge placed there is 2 Coulomb. The force experienced by that charge is:

a) 10 N
b) 22 N
c) 20 N
d) 12 N
21. In the equation Q = C V if V is twice then:

a) Q / C
b) None of these
c) C = Q
d) Q = 2 C
22. The quantity of charge stored in a capacitor is considered as its:

a) Area of the capacitor
b) Potential difference
c) Series
d) Capacitance
23. Unlike charges repel each other:

a) False
b) True
24. The value of eletrostatic constant K is:

a) 9 x 109 C2/Nm2
b) 9 x 10^-9 Nm2/C2
c) 9x 109 Nm2/C2
d) 9 x109 N
25. The equivalent capacitance of the series combination of capacitors is equal to sum of the reciprocals of all the individual capacitance.

a) False
b) True
26. The insulator which is used between the plates of capacitors is called as:

a) Di-electric
b) Bi-electric
c) Neutral
d) All of these
27. The free electrons are bound only to a particular atom.

a) False
b) True
28. The numerical value of electric charge on an electron is:

a) 1.67 x 10 -19 Coulomb
b) 1.6 x 10 19 Coulomb
c) 6.25 x 10 18 Coulombs
d) 9.11 x 10 -31 Coulombs
29. Electric Intensity is measured in:

a) N.Coulomb
b) N / Coulomb
c) N x Coulomb 2
d) Coulomb / N
30. In the parallel combination of capacitors the potential difference will be:

a) Same for each capacitor
b) Double by capacitor to capacitor
c) Changes slightly
d) Becomes four times on each capacitor
31. if the capacitors are connected plate to plate, i.e., right plate of one capacitor is conneted to left plate of next capacitor then the combination is called:

a) Mix combination
b) None of these
c) Series combination
d) Parallel combination
32. The electric field around a charge is indicated by:

a) Imaginary electric lines of force
b) Series combination
c) Scalar quantity
d) Farad
33. The unit of Potentail difference is Volt which is expressed as:

a) N / coulomb
b) coulomb / N
c) Joule / Coulomb
d) Joule / Sec
34. Positive charge appears on an atom due to:

a) Loss of electron
b) None of these
c) Gain of proton
d) Addition of electrons
35. The forces at a point in the field of a charge is equal to the product of electric intensity and magnitude of charge.

a) False
b) True
36. The atom of an element consists of two parts:

a) Nucleus & other than nucleus
b) Neutrons, electrons
c) Protons & neutrons
d) Protons & electrons
37. The unit of capacitance is:

a) Volt
b) Ohm
c) Ampere
d) Farad
38. The unit of Capacitance of a capacitor Farad is expressed as:

a) Volt . m
b) Coulomb / Sec
c) Coulomb / Volt
d) Volt .m
39. The S.I unit of electric potential is:

a) Coulomb
b) N/C
c) Farad
d) Volt
40. Electron volt is the unit of:

a) Energy
b) Potential difference
c) Power
d) Nuclear power
41. The strength of the field at a point is related to the number of lines of force.

a) False
b) True
42. Capacitor

a) Charge
b) emf
c) Electric flux
d) P.D
43. One electron volt is equal to:

a) 1.6 *10-6J
b) 1.6 *10-18J
c) 1.6 *10-19J
d) 1.5 *10-17J
44. If the charges are unlike, then the direction of electric intensity is directed away from the charge.

a) True
b) False
45. The strength of electric field at a point away form the the point charge is given by:

a) None of these
b) E = F / Q
c) Q = C V
d) E = K q / r2
46. The amount of charge stored in a capacitor is directly propotional to its:

a) Material of the plates
b) Current supplied
c) Distance between the plates
d) Potential difference applied across it
47. The unit of electric charge is:

a) ev
b) Ampere
c) Farad
d) Coulomb
48. By decreasing the distance between the plates of capacitor its capacity is :

a) Remains the same
b) Increases
c) None of these
d) Decreases
49. A positive charge of 2 coulombs experiences a force 4 N at a point in a field then intensity of the field at that point is:

a) 2 N/C
b) 4 N/C
c) 6 N
d) 8 N
50. Electrostatic phenomena can be used for separation of smoke and other particles from gases.

a) True
b) False
51. The capacitors used for tuning radio sets are called:

a) Variable capacitor
b) High capacitor
c) Fixed capacitor
d) Low capacitor
52. Electric intensity is a:

a) Vector quantity
b) Magnetic force
c) Scalar quantity
d) Gravitational constant
53. Energy released due to transfer of an electron

a) volt
b) ev
c) N/C
d) coulomb
54. Electric field intensity is expressed in:

a) Volt
b) N/C
c) Farad
d) Coulomb
55. The direction of the electric lines of force is indicated by the direction of motion of the proton.

a) False
b) True
56. The energy supplied by a unit charge as it moves from one point to another is called as:

a) Work done
b) Kinetic energy
c) Electric field intensity
d) Potential difference
57. Electroscope can be used to distinguish between insulators and conductors

a) False
b) True
58. In Columb's law the electrostatic force is directly propotional to the:

a) None of these
b) Product of masses
c) Distance and charge
d) Product of charges
59. If the two capacitors are each of 2micro farad are connected in series comination then their equivalent capacitance will be

a) 2mew F
b) 3mew F
c) 4mew F
d) 1micro F
60. If the capacitance of a capacitor is 10mewF and potential difference is 2 volts then charge stored is:

a) 20 x 106 Coulombs
b) 30 Coulombs
c) 20 x 10-6 Coulombs
d) 20 Coulombs
61. The divergence in the leaves of the electroscope is due to:

a) Electric field intensity
b) Potential difference
c) Like charges
d) Electric lines of force
62. The phenomenon in which charges remain static is called electric current

a) True
b) False
63. One milli Coulomb =

a) 10 -3 Coulomb
b) 1000 Coulomb
c) 10 6 Coulomb
d) 10000 Coulomb
64. The unit of potential difference is:

a) Watt
b) Joule / sec
c) Volt
d) Coulomb
65. The unit of capacitance is:

a) ev
b) Coulomb
c) Ampere
d) Farad
66. The P.D between two points is 110 Volt. If an unknown charge is moved between these points, the amount of work done is 550 joule. Find the value of charge:

a) 25 Coulb
b) 100 Coulb
c) 5 Coulb
d) 15 Coulb
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