# FSC Physics MCQs Chapter 12 Class 12

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Physics Ch 12 Class 12 Electrostatics

1 / 101

Unit of capacitance is:

2 / 101

The net charge flowing through any section of the conductor per unit time is known as?

NTS 2015 SMBBMC
Physics
Electrostatics
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3 / 101

The energy supplied by the cell to the charge carriers is derived from the conversion of:

NUMS 2016
Physics
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4 / 101

The total outward flux over any closed hypothetical surface called _____ is equal to the total charge enclosed divided by ε irrespective of how the charge is distributed.

NTS 2015 DUHS and JSMU
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5 / 101

In E = F/Q, the charge is

6 / 101

60) What happens when a positive rod is placed near a neutral sphere?

7 / 101

A proton has mass m and charge q. It is suspended in electric and gravitational field. What is the magnitude of electric field?

PMC Sample 3
Physics
Electrostatics
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8 / 101

Which of the following can’t be used as a dielectric in a capacitor

9 / 101

A charge is moving with velocity v, it enters a uniform electric field E. The direction of v and E are not parallel. What is the path of the charge particle inside the electric field?

PMC Sample 2
Physics
Electrostatics
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10 / 101

Two equal, opposite charges are fixed at a distance d. Positive charge is at the right and negative at the left position. As shown below:

X – Y + Z

At which position, the net electric field is directed to the left?

PMC Sample 2
Physics
Electrostatics
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11 / 101

Two positive point charges Q1 = 16 microCoulombs and Q2 = 4 micro Coulombs are seperated in a line by a distance of 3 meters. Find the spot on the line between the charges where the electric field is zero.

NUMS 2019 Reconduct
Physics
Electrostatics
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12 / 101

Which statement describes the electric potential difference between two points in the electric field of charge Q?

NTS 2019
Physics
Electrostatics
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13 / 101

Two capacitors C1 = 2μF and C2 = 4μF, are connected in series across a 100 V supply.

Find the effective capacitance:

NTS 2010
Physics
Electrostatics
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14 / 101

Electric potential is a quantity.

15 / 101

If two point charges of charge q1 and q2 are placed at distance d, then the force between them is proportional to:

PMC Sample 1
Physics
Electrostatics
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16 / 101

Flux passing through an area does not depend upon

17 / 101

If magnitude of charges is doubled and distance between them is halved, the force between them will become?

18 / 101

The energy stored in the capacitor is written as:

NUMS 2019 Cancelled
Physics
Electrostatics
Elimination Tool:

19 / 101

Electron volt is the unit of

20 / 101

The greek word “xeros” and “graphos” means:

PMC Sample 2
Physics
Electrostatics
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21 / 101

The electric field of a point charge is in shape.

22 / 101

The charge on neutron is:

NUMS 2018
Physics
Electrostatics
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23 / 101

If a 2 µF capacitor is connected, by closing a switch, to a supply of 100 volts through  1M ohm  series resistance. What will be the time constant?

24 / 101

Value of  ∊ s is:

25 / 101

If the potential difference of 1 volt is applied across the end of a conductor and the current flowing through the conductor is one ampere then the resistance of the conductor is said to be?

NTS 2015 SMBBMC
Physics
Electrostatics
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26 / 101

SI unit of electric field is volt/meter which is equivalent to:

NUMS 2019 Reconduct
Physics
Electrostatics
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27 / 101

Two capacitors C1 = 3 uF and C2 = 6 uF are in series across a 90 volts D.C. supply. The total capacitance is given by:

NTS 2012
Physics
Electrostatics
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28 / 101

Two negative charges are present at a distance d. A third positive charge is placed somewhere between these charges. This positive charge will be in equilibrium.

29 / 101

Two positive charges are separated by 3m. Another positive charge is placed between them. If the charge is moved along y axis the system will be in equilibrium

30 / 101

If capacitor is connected with battery and is fully charged then

31 / 101

A 2uF capacitor is connected to a 10 V dc supply, if ‘Q’ represents the charge on each plate and ‘E’ the energy stored on each plate, which of the following represents the values of Q and E?

NUMS 2019 Cancelled
Physics
Electrostatics
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32 / 101

0.37q charge Is stored on the capacitor, what will be the current?

33 / 101

When a charge Q on a capacitor is doubled, then energy stored U will be:

NUMS 2020
Physics
Electrostatics
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34 / 101

Ratio of Electrical Constant to Gravitational constant is approximately:

35 / 101

Capacitance increases by

36 / 101

If the electric field is E = x/y then y is?

37 / 101

A parallel plate capacitor has a capacitance C. If the distance between the plates and the plates both halves, the capacitance will be?

NUMS 2017
Physics
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38 / 101

e/m for an electron is ______, when the charge of an electron is 1.6 x 10-19C and mass of electron is 9.1 x 10-31kg.

NUMS 2019 Reconduct
Physics
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39 / 101

If we double the separation between two charges then coulomb’s force will become?

NUMS 2020
Physics
Electrostatics
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40 / 101

When some charge is given to a soap bubble it

41 / 101

Ohm multiplied by farad is equivalent to:

PMC 2020
Physics
Electrostatics
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42 / 101

If a potential difference of V appears on the plates of a capacitor with capacitance C, then energy stored will be:

43 / 101

An electron is placed between two charged plates the upper plate is positively charged and the lower plate is negative charged. The electron will

44 / 101

Unit of electric field is:

45 / 101

Electron Volt is the unit of:

PMC Sample 1
Physics
Electrostatics
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46 / 101

What is true about the electric field and electric force?

NUMS 2016
Physics
Electrostatics
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47 / 101

A particle carrying charge of 2e falls through a potential difference of 3.0 V. Calculate energy acquired by it.

NTS 2015 DUHS and JSMU
Physics
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48 / 101

If a body A is charged with charge q, and is touched with neutral body B and then with neutral body C. What will be the charge on C after the contact?

49 / 101

If the medium is changed from air to diamond what would be the effect in potential difference of a capacitor?

50 / 101

Electric intensity between two plates of a capacitor equals:

51 / 101

An electron is situated midway between two parallel plates 0.5 cm apart. One of the plates is maintained at a potential of 60 volts above the other. The force on the electron is (e = -1.6×10-19)

NTS 2011
Physics
Electrostatics
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52 / 101

A charge is situated in the center of cube. The electric flux through one of the faces of the cube is.

53 / 101

Two charges of same magnitude are placed, the force between the charges will be maximum in presence of which medium?

54 / 101

If 60 capacitors each of Capacitance C are connected in series and then in parallel what is the ratio of Cs/Cp=?

55 / 101

What will be the change in potential energy if an electron moves 4.5m in the direction of an electric field of strength 325 N/C?

56 / 101

If the potential at a point which is 1m from a charge is 1 volt, then the potential at a point which is 2m from the same charge will be:

PMC 2020
Physics
Electrostatics
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57 / 101

If the angle b/w electric field and vector area A is rr/3 then electric flux will be?

58 / 101

Electric field strength of a point charge is E and electric potential is V, at a distance ‘r’ from the point charge. What is the electric potential at a point for the same point charge where electric field strength is E/4?

UHS 2019
Physics
Electrostatics
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59 / 101

What is the change in kinetic energy of a proton when it is accelerated through a potential difference of 2MV?

PMC Sample 1
Physics
Electrostatics
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60 / 101

Unit of permittivity in free space is?

61 / 101

A 10 nanofarad (10 x 10-9 F) parallel plate capacitor holds a charge of magnitude 50 µC on each plate.If the plates are separated by a distance of 0.885mm, what is the area of each plate?

NTS 2014
Physics
Electrostatics
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62 / 101

What will be the new Surface Density if Electric Intensity is increased to 3 times?

63 / 101

Unit of Electric Intensity is

64 / 101

A proton Is moving in direction of negative x-axis, what will happen to it if potential difference of V = -10x + 7 is applied across the field.

65 / 101

If a dielectric material is placed between two plates of a capacitor, the net capacitance of the capacitor:

NTS 2018
Physics
Electrostatics
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66 / 101

If the potential difference between the plates of a capacitor with capacitance C is 4V, how much charge will accumulate on each of its plate?

67 / 101

Two identical conducting spheres A and B carry equal charge Q. They are separated by a distance much larger than their diameters. A third identical conducting sphere C carries charge 2Q. Sphere C is first touched to A, then to I3, and finally removed. As a result, the electrostatic force between A and B, which was originally F, becomes:

68 / 101

In what form is the energy stored in a charged capacitor?

PMC 2020
Physics
Electrostatics
Elimination Tool:

69 / 101

70 / 101

If two point charges of charge q1 and q2 are placed at distance d. The force between them is proportional to:

PMC Sample 2
Physics
Electrostatics
Elimination Tool:

71 / 101

The energy stored inside a capacitor is given by the relation:

NUMS 2019 Reconduct
Physics
Electrostatics
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72 / 101

Three times decrease in the distance between the plates of a parallel plate capacitor will _______.

NTS 2019
Physics
Electrostatics
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73 / 101

Capacitors store

74 / 101

Which one is the correct statement about selenium?

PMC Sample 2
Physics
Electrostatics
Elimination Tool:

75 / 101

When wood is replaced by air as dielectric. The capacitance of capacitor

76 / 101

The unit of the product of RC in the charging of a capacitor Is:

77 / 101

Energy stored in capacitor is represented by.

78 / 101

Two charges are separated by a distance r, in presence of which of the following the force between them will be minimum?

79 / 101

Electrical effects due to friction are studied in:

80 / 101

Energy required to charge a capacitor of 5 micro farad by connecting D.0 source of 20 KV is a) 10kJ b) 5k1 c) 21:.1 d) 11(1

81 / 101

The force between two point charges separated by a certain distance is F. If each charge is doubled and the distance between them is also doubled, then the force would be:

PMC Sample 1
Physics
Electrostatics
Elimination Tool:

82 / 101

An electric rod of 2000 watts rating boils a certain quantity of water in 10 minutes, the heat which generated for boiling this water is:

NTS 2013
Physics
Electrostatics
Elimination Tool:

83 / 101

Flux passing through an area does not depend upon

84 / 101

For a proton moving in the direction of the electric field

85 / 101

By increasing the area of the plates and decreasing the distance between them, the capacitance of a capacitor:

NUMS 2020
Physics
Electrostatics
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86 / 101

When two suspended objects are seem to attract each other electrically:

87 / 101

When a charged particle is projected perpendicular to a magnetic field:

NUMS 2016
Physics
Electrostatics
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88 / 101

Two conducting objects X and Y having a charge Q on them exert force F on each other. Now third conductor having a charge -Q is touched to X and is removed, the new force between X and Y will be:

89 / 101

Q2/C has the units of?

90 / 101

A sphere of charge +Q is fixed in a position. A smaller sphere of +q is placed near the larger sphere and released from the rest. The small sphere will move away from the large sphere with?

NTS 2014
Physics
Electrostatics
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91 / 101

Energy stored in capacitors connected in parallel

92 / 101

The magnitude of electrostatic acceleration force between two point charges is directly proportional to the product of the magnitude of the charges and inversely proportional to the square of the distance between them.” This is known as:

NTS 2015 SMBBMC
Physics
Electrostatics
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93 / 101

If two charged conductors are joined by wire, then which of following will happen?

94 / 101

if electron is moving along positive x axis and where V= Sx*3 then it

95 / 101

Product of R and C is

96 / 101

Two positive point charges are placed 2m apart. The electric potential at midpoint due to these two charges will be _____:

NUMS 2020
Physics
Electrostatics
Elimination Tool:

97 / 101

If voltage of a capacitor is 60 v then what will be the voltage if diamond is present as •dielectric

98 / 101

If a closed surface contains two equal and opposite The net electric flux from the surface will be

99 / 101

Electric flux Is positive when

100 / 101

The values of electric intensity will ____ due to the presence of dielectric medium:

PMC 2020
Physics
Electrostatics
Elimination Tool:

101 / 101

Unit of CV^2 is equivalent to that of?

The average score is 52%

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### 5 responses to “FSC Physics MCQs Chapter 12 Class 12”

1. Chand Ali says:

Good mcqs

2. Anonymous says:

wrong answer its a scalar quantity

3. Anonymous says:

?❤️❤️✌️?

4. Anonymous says:

An electron is situated midway between two parallel plates 0.5 cm apart. One of the plates is maintained at a potential of 60 volts above the other. The force on the electron is (e = -1.6×10-19)

• M.jamshaid says:

Please give us explanation of mcqs

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Salam