Free Printable REVIEW: Capacitors & Capacitance

1.

A parallel plate capacitor is connected to a cell of constant emf. The plates are moved further apart without disconnecting the cell. What happens to the capacitance and voltage across the plates?

a)

capacitance increases; voltage remains constant

b)

capacitance remains constant; voltage decreases

c)

capacitance decreases; voltage increases

d)

capcitance decreases; voltage remains constant

2.

Capacitors C₁ and C₂ are connected in parallel and a potential difference is applied to the combination. If the capacitor that is equivalent to the combination has the same potential difference, then the charge on the equivalent capacitor is the same as:

a)

the charge on C₁

b)

the sum of the charges on C₁ and C₂

c)

the difference of the charges on C₁ and C₂

d)

the product of the charges on C₁ and C₂

3.

Two identical capacitors are connected in series and two, each identical to the first, are connected in parallel. The equivalent capacitance of the series connection is ________ the equivalent capacitance of parallel connection.

a)

twice

b)

four times

c)

half

d)

one fourth

4.

Capacitors C₁ and C₂ are connected in series. The equivalent capacitance is given by:

a)

C₁C₂/(C₁ + C₂)

b)

(C₁ + C₂)/C₁C₂

c)

1/(C₁ + C₂)

d)

C₁ + C₂

5.

Capacitor C₁ and C₂ are connected in parallel. The equivalent capacitance is given by:

a)

C₁ + C₂

b)

1/(C₁ + C₂)

c)

C₁C₂/(C₁ + C₂)

d)

(C₁ + C₂)/C₁C₂

6.

Each of the four capacitors shown is 500 microF. The voltmeter reads 1000V. The magnitude of the charge on each capacitor plate is:

a)

0.2 C

b)

0.5 C

c)

20 C

d)

50 C

7.

A parallel-plate capacitor has a plate area of 0.2 m² and a plate separation of 0.1 mm. To obtain an electric field of 2.0 ´ 10⁶ V/m between the plates, the magnitude of the charge on each plate should be:

a)

3.5 ´ 10^-6C

b)

7.1 ´ 10^-6C

c)

1.4 ´ 10^-5C

d)

1.8 ´ 10^-5C

8.

If both the plate area and the plate separation of a parallel-plate capacitor are doubled, the capacitance is:

a)

doubled

b)

halved

c)

unchanged

d)

one-fourth the original

9.

What is a Parallel circuit?

a)

Has only one path

b)

Has more than one path

c)

Allows energy to travel through easily

d)

Has only one light bulb

10.

If a p.d of 5V is across the combination, what is the total energy stored by the combination?

a)

68.8J

b)

1.71x10^-3J

c)

8.59x10^-4J

d)

4.00x10^-3J

11.

An uncharged capacitor is connected to a battery.

a)

A

b)

B

c)

C

d)

D

12.

An uncharged capacitor is connected to a battery.

a)

A

b)

B

c)

C

d)

D

13.

A capacitor of capacitance C has a potential difference V across it and stores energy Z joules. A second capacitor has a capacitance of C/2 and a potential difference of 2V across it. What is the energy stored on the second capacitor?

a)

Z

b)

2Z

c)

4Z

d)

8Z

14.

Capacitor is a device used to store ----

a)

electric charge and power

b)

electric charge and electric energy

c)

electric energy and power

d)

power and potential

15.

SI unit of capacitance is

a)

Coulomb per newton

b)

Coulomb per volt

c)

volt per meter

d)

.newton

16.

Unit of capacitance is___________

a)

Volt

b)

Ampere

c)

Farad

d)

Ohms

17.

Which electronic components can be polarized and non-polarized?

a)

resistors

b)

inductors

c)

capacitors

d)

transformers

18.

A ___ is most closely related to a capacitor

a)

Battery

b)

LED light

c)

Insulator

d)

Dimmer switch

19.

Composed of individual electronic components, such as resistors, transistors, capacitors, inductors and diodes, connected by conductive wires or traces through which electric current can flow.

a)

Digital

b)

Circuits

c)

Voltage

d)

Fuses

20.

In a charged capacitor, the energy resides

a)

The positive charges

b)

Both the positive and negative charges

c)

The field between the plates

d)

Around the edge of the capacitor plates

21.

The capacitance of a parallel-plate capacitor can be increased by:

a)

increasing the charge

b)

decreasing the charge

c)

increasing the plate separation

d)

decreasing the plate separation

22.

What is the voltage across the plates of the capacitor if the capacitance is 10 uF and the Charge stored is 30 uC?

a)

0.333 V

b)

3 V

c)

300 V

23.

------------------------ is created out of two metal plates and an insulating material called a dielectric.

a)

An inductor

b)

A capacitor

c)

A fixed resistor

d)

A variable resistor

24.

In the capacitor, the dielectric can be made out of all sorts of ---------- materials and the plates are made of a -------------- material.

a)

conductive, insulating

b)

conductive, conductive

c)

insulating, conductive

d)

insulating, insulating

25.

The figure to the right represents:

a)

Capacitor

b)

Diode

c)

Inductor

d)

Resistor

26.

With respect to the capacitor, which relationship is true? •

a)

C = Q×V

b)

V = C×Q

c)

V = Q/C

d)

Q = C/V

27.

With respect to the capacitor, which relationship is true?

a)

C = Q/V

b)

V = C×Q

c)

Q = C/V

d)

Q = V/C

28.

How is the capacitance (C) of a parallel-plate capacitor affected by the charge on the plates ?

a)

C depend on the charge on the plates

b)

C is vanished when there are plates

c)

C does not depend on the charge on the plates

d)

C is accumulated on one side only

29.

How is the capacitance of a parallel-plate capacitor affected by the potential difference across the capacitor ?

a)

C depend on the potential difference across the capacitor

b)

C does not depend on the potential difference across the capacitor

c)

C partially depend on the potential difference across the capacitor

d)

C sometime depend on the potential difference across the capacitor

30.

How is the capacitance of a parallel-plate capacitor affected by the area of each plate?

a)

C is directly proportional to the area A of each plate

b)

C is inversely proportional to the area A of each plate

c)

C is partially proportional to the area A of each plate

d)

C is fully proportional to the area A of each plate

31.

How is the capacitance of a parallel-plate capacitor affected by the distance between the plates ?

a)

C is directly proportional to the area A of each plate

b)

C is inversely proportional to the distance d between the plates

c)

C is partially proportional to the area A of each plate

d)

C is not affected by the area A of each plate

32.

How is the capacitance of a parallel-plate capacitor affected by filling the space between the plates with an insulator ?

a)

C stable when the space between the plates is filled with an insulator, ε_r >1

b)

C reduces when the space between the plates is filled with an insulator, ε_r >1

c)

C increases when the space between the plates is filled with an insulator, ε_r >1

d)

C fluctuate when the space between the plates is filled with an insulator, ε_r >1

33.

If C is the capacitance in Farads, ϵ permittivity of the dielectric, A area of plate overlap in square meters and d distance between plates in meters, then:

a)

C = ϵd/A

b)

C = A/ϵd

c)

C = ϵA/d

d)

C = d/ϵA

34.

If the capacitance is 47μF, and the voltage difference across the capacitor terminals is 6V, then the energy stored in that capacitor is:

a)

846×10^-6Joule

b)

7.23×10^-3 Joule

c)

6.76×10^-5Joule

d)

5.94×10^-2Joule

35.

What is the voltage across the plates of the capacitor if the capacitance is 10 uF and the Charge stored is 30 uC?

a)

0.333 V

b)

3 V

c)

300 V

36.

The plates of a parallel-plate capacitor are 2.50mm apart, and each carries a charge of magnitude 80.0nC. The plates are in vacuum. The electric field between the plates has a magnitude of 4.00x10⁶V/m. What is the potential difference between the plates?

a)

2.00x10⁴V

b)

1.75x10^{4 P.D.}

c)

1.00x10^-4P

d)

1.00x10⁴V

e)

not solvable! because capacitor has no potential difference because it should have an insulator in between.

37.

from question 16:

The plates of a parallel-plate capacitor are 2.50mm apart, and each carries a charge of magnitude 80.0nC. The plates are in vacuum. The electric field between the plates has a magnitude of 4.00x10⁶V/m.

What is the area of each plates?

a)

2.26x10^-3cm²

b)

2.26x10^-3m²

c)

22.6m²

d)

2.26cm²

e)

none of the above

38.

The plates of a parallel-plate capacitor are 2.50mm apart, and each carries a charge of magnitude 80.0nC. The plates are in vacuum. The electric field between the plates has a magnitude of 4.00x10⁶V/m.

what is the capacitance?

a)

zero

b)

same as potential difference 4.00pF

c)

8.99pF

d)

8pF

e)

8.00x10^-9F

39.

Is it correct to say that the capacitance is inversely proportional to the area of the parallel plates?

a)

True

b)

False

40.

Capacitor is a device use to store energy. Therefore a solar cell is a type of capacitor.

a)

True

b)

False

41.

The capacitance of a parallel-plate capacitor can be increased by:

a)

increasing the charge

b)

decreasing the charge

c)

increasing the plate separation

d)

decreasing the plate separation

42.

What is the voltage across the plates of the capacitor if the capacitance is 10 uF and the Charge stored is 30 uC?

a)

0.333 V

b)

3 V

c)

300 V

43.

------------------------ is created out of two metal plates and an insulating material called a dielectric.

a)

An inductor

b)

A capacitor

c)

A fixed resistor

d)

A variable resistor

44.

In the capacitor, the dielectric can be made out of all sorts of ---------- materials and the plates are made of a -------------- material.

a)

conductive, insulating

b)

conductive, conductive

c)

insulating, conductive

d)

insulating, insulating

45.

The figure to the right represents:

a)

Capacitor

b)

Diode

c)

Inductor

d)

Resistor

46.

With respect to the capacitor, which relationship is true? •

a)

C = Q×V

b)

V = C×Q

c)

V = Q/C

d)

Q = C/V

47.

With respect to the capacitor, which relationship is true?

a)

C = Q/V

b)

V = C×Q

c)

Q = C/V

d)

Q = V/C

48.

How is the capacitance (C) of a parallel-plate capacitor affected by the charge on the plates ?

a)

C depend on the charge on the plates

b)

C is vanished when there are plates

c)

C does not depend on the charge on the plates

d)

C is accumulated on one side only

49.

How is the capacitance of a parallel-plate capacitor affected by the potential difference across the capacitor ?

a)

C depend on the potential difference across the capacitor

b)

C does not depend on the potential difference across the capacitor

c)

C partially depend on the potential difference across the capacitor

d)

C sometime depend on the potential difference across the capacitor

50.

How is the capacitance of a parallel-plate capacitor affected by the area of each plate?

a)

C is directly proportional to the area A of each plate

b)

C is inversely proportional to the area A of each plate

c)

C is partially proportional to the area A of each plate

d)

C is fully proportional to the area A of each plate

51.

How is the capacitance of a parallel-plate capacitor affected by the distance between the plates ?

a)

C is directly proportional to the area A of each plate

b)

C is inversely proportional to the distance d between the plates

c)

C is partially proportional to the area A of each plate

d)

C is not affected by the area A of each plate

52.

How is the capacitance of a parallel-plate capacitor affected by filling the space between the plates with an insulator ?

a)

C stable when the space between the plates is filled with an insulator, ε_r >1

b)

C reduces when the space between the plates is filled with an insulator, ε_r >1

c)

C increases when the space between the plates is filled with an insulator, ε_r >1

d)

C fluctuate when the space between the plates is filled with an insulator, ε_r >1

53.

If C is the capacitance in Farads, ϵ permittivity of the dielectric, A area of plate overlap in square meters and d distance between plates in meters, then:

a)

C = ϵd/A

b)

C = A/ϵd

c)

C = ϵA/d

d)

C = d/ϵA

54.

If the capacitance is 47μF, and the voltage difference across the capacitor terminals is 6V, then the energy stored in that capacitor is:

a)

846×10^-6Joule

b)

7.23×10^-3 Joule

c)

6.76×10^-5Joule

d)

5.94×10^-2Joule

55.

What is the voltage across the plates of the capacitor if the capacitance is 10 uF and the Charge stored is 30 uC?

a)

0.333 V

b)

3 V

c)

300 V

56.

The plates of a parallel-plate capacitor are 2.50mm apart, and each carries a charge of magnitude 80.0nC. The plates are in vacuum. The electric field between the plates has a magnitude of 4.00x10⁶V/m. What is the potential difference between the plates?

a)

2.00x10⁴V

b)

1.75x10^{4 P.D.}

c)

1.00x10^-4P

d)

1.00x10⁴V

e)

not solvable! because capacitor has no potential difference because it should have an insulator in between.

57.

from question 16:

The plates of a parallel-plate capacitor are 2.50mm apart, and each carries a charge of magnitude 80.0nC. The plates are in vacuum. The electric field between the plates has a magnitude of 4.00x10⁶V/m.

What is the area of each plates?

a)

2.26x10^-3cm²

b)

2.26x10^-3m²

c)

22.6m²

d)

2.26cm²

e)

none of the above

58.

The plates of a parallel-plate capacitor are 2.50mm apart, and each carries a charge of magnitude 80.0nC. The plates are in vacuum. The electric field between the plates has a magnitude of 4.00x10⁶V/m.

what is the capacitance?

a)

zero

b)

same as potential difference 4.00pF

c)

8.99pF

d)

8pF

e)

8.00x10^-9F

59.

Is it correct to say that the capacitance is inversely proportional to the area of the parallel plates?

a)

True

b)

False

60.

Capacitor is a device use to store energy. Therefore a solar cell is a type of capacitor.

a)

True

b)

False

61.

Tick all the factors that affect capacitance below:

a)

Area

b)

Dielectric

c)

Distance

d)

Power Rating

62.

What is the unit of capacitance

a)

Ohm

b)

Henry

c)

Farad

d)

Watt

63.

35V is stamped on the side of a capacitor. This means

a)

Don't exceed 35 Volts (working voltage)

b)

Provide with a minimum of 35 Volts or the capacitor won't work

c)

35 micro-Farads

64.

Connecting Capacitors in parallel means

a)

add the capacitance up

b)

the distance between plated has increased

c)

no change

65.

If you charge up a capacitor from zero to 100V, what voltage will it be after 1 time constant?

a)

1 Volt

b)

6.32 Volts

c)

63.2 Volts

d)

100 Volts

66.

What is the dielectric constant of air?

a)

1

b)

2

c)

10

d)

3

67.

What is the formula for capacitors in parallel?

a)

C_T = C₁ + C₂ + C₃

b)

C_T = C₁ x C₂ x C₃

c)

1/C_T = 1/(C₁ + C₂ + C₃)

68.

If you have a 1 milli-farad capacitor and a 10 kilo-ohm resistor in series, what is the time constant?

a)

1 second

b)

10 seconds

c)

100 seconds

d)

5 seconds

69.

Which of the following is the function of a capacitor?

a)

To block current from flowing through the circuit

b)

To amplify the current

c)

To ensure the current flows only in one direction

d)

To discharge electrical charges and provide electrical energy to the circuit when needed

70.

Which of the following is the symbol for a capacitor?

a)

b)

c)

d)

71.

What is the unit of measurements for Capacitance?

a)

Farads

b)

Ohms

c)

Volts

d)

Coulombs

72.

How does a capacitor works?

a)

The battery provide positive and negative charges to each terminal of the capacitor

b)

The negative charges is attracted to the positive terminal while the negative terminal gains negative charges

c)

When there is no power supply, the capacitor releases the extra charges as electrical energy

1)

2)

3)

73.

In a charged capacitor, the energy resides

a)

The positive charges

b)

Both the positive and negative charges

c)

The field between the plates

d)

Around the edge of the capacitor plates

74.

The energy of a charged capacitor is given by the expression (q= charge on the conductor and C = its capacity)

a)

$\frac{q^2}{2C}$

b)

$\frac{q^2}{C}$

c)

$\frac{q^{ }}{2C^2}$

d)

2qC

75.

The capacity of a parallel plate condenser is C . Its capacity when the separation between the plates is halved will be

a)

4C

b)

2C

c)

C/2

d)

C/4

76.

Can a metal be used as a medium for dielectric

a)

Depends on its shape

b)

Depends on dielectric

c)

YES

d)

NO

77.

When a slab of dielectric material is introduced between the parallel plates of a capacitor which remains connected to a battery, then charge on plates relative to earlier charge

a)

Is less

b)

Is same

c)

Is more

d)

May be less or more depending on the nature of the material introduced

78.

Two condensers of capacity 0.3 $\mu$ F and 0.6 $\mu$ F respectively are connected in series. The combination is connected across a potential of 6 Volts. The ratio of energies stored by the condensers will be

a)

1/2

b)

2

c)

1/4

d)

4

79.

Three equal capacitors, each with capacitance are connected as shown in figure. Then the equivalent capacitance between and is

a)

C

b)

C/3

c)

3C

d)

3C/2

80.

Change Q on a capacitor varies with voltage V . The area of triangle OAB represents

a)

Capacitance

b)

Capacitive reactance

c)

Magnetic field between the plates

d)

Energy stored in the capacitor

81.

A capacitor is charged to 200 volt it has 0.1 coulomb charge. When it is discharged, energy will be

a)

1 J

b)

4 J

c)

20 J

d)

10 J

82.

The resultant capacitance between and in the following figure is equal to

a)

1 $\mu$ F

b)

3 $\mu$ F

c)

2 $\mu$ F

d)

1.5 $\mu$ F

83.

During charging a capacitor variation of potential V of the capacitor with time t is shown as

a)

b)

c)

d)

84.

Tick the correct option/options

a)

Equivalent capacitance in series combination is least among all capacitors

b)

Equivalent capacitance in series combination is greatest among all capacitors

c)

Charge on capacitor plates changes when dielectric is inserted between the plates

d)

Capacitance of a capacitor does not depends on charge

85.

When capacitors is arrange in series (3 capacitors), the equivalent capacitance C is

a)

C = C₁ + C₂ + C₃

b)

1/C = 1/C₁ + 1/C₂ + 1/C₃

c)

C = QV₁ + QV₂ + QV₃

d)

C = CR₁ + CR₂ + CR₃

86.

When capacitors in parallel (3 capacitors), the equivalent capacitance is

a)

C = C₁ + C₂ + C₃

b)

C = 1/C₁ + 1/C₂ + 1/C₃

c)

C = QV₁ + QV₂ + QV₃

d)

C = QV₁ + QV₂ + QV₃

87.

1. A ____________ connection has 2 or more components connected so that there is more than one path for current to flow.

a)

series

b)

parallel

c)

series/parrallel

d)

polarized

88.

2. A ____________ connection has 2 or more components connected so that there is only 1 path for current to flow

a)

perpendicular

b)

parallel/series

c)

polarized

d)

series

89.

6. The total capacitance of two capacitors connected in series is _____________ the lowest value capacitor

a)

equal to

b)

opposite

c)

greater than

d)

less than

90.

7. Electrical prints use standard symbols and abbreviations to show ___________ operation and device use.

a)

battery

b)

circuit

c)

switch

d)

capacitor

91.

Each of the four capacitors shown is 500 mF. The voltmeter reads 1000V. The magnitude of the charge on each capacitor plate is:

a)

0.2 C

b)

0.5 C

c)

20 C

d)

50 C

92.

Two identical capacitors are connected in series and two, each identical to the first, are connected in parallel. The equivalent capacitance of the series connection is ________ the equivalent capacitance of parallel connection.

a)

twice

b)

four times

c)

half

d)

one fourth

93.

Capacitors C₁ and C₂ are connected in parallel and a potential difference is applied to the combination. If the capacitor that is equivalent to the combination has the same potential difference, then the charge on the equivalent capacitor is the same as:

a)

the charge on C₁

b)

the sum of the charges on C₁ and C₂

c)

the difference of the charges on C₁ and C₂

d)

the product of the charges on C₁ and C₂

94.

If 4μF and 2μF capacitors are conneced in series, the equivalent capacitor is ___________.

a)

1.33μF

b)

0.75μF

c)

6μF

d)

2μF

95.

A 130 mF capacitor and a 150 mF capacitor are each connected across a 6 V dc source. The voltage

across the 330 pF capacitor is ?

a)

8 Volts

b)

6 Volts

c)

4 Volts

d)

2 Volts

96.

If the maximum amount of charge held by a capacitor at a voltage of 12V is 36C, what is the capacitance of this capacitor?

a)

0.33 Volts

b)

3 Volts

c)

24 Volts

d)

432 Volts

97.

Combined capacitance is equal to the ?

a)

sum of all capacitance of capacitors

b)

product of all the capacitance

c)

difference between the capacitors

d)

average between the capacitors

98.

If capacitors are connected in parallel, then potential difference across each capacitor is

a)

same

b)

zero

c)

different

d)

infinite

99.

When a 4 V battery is connected to a capacitor, what is the voltage across the capacitor after a long period of time?

a)

0.0 V

b)

2.0 V

c)

4.0 V

d)

3.0 V

100.

A proton moves 10 cm on a path in the direction of a uniform electric field of strength 3.0 N/C. How much work is done on the proton by the electrical field?

a)

4.8 x 10^-20 J

b)

-4.8 x 10^-20 J

c)

.6 x 10^-20 J

d)

zero

101.

A 9.0-V battery is connected between two parallel metal plates 4.0 mm apart. What is the magnitude of the electric field between the plates?

a)

2.3 x 10³ N/C

b)

9.0 N/C

c)

2.3 N/C

d)

0.75 x 10^-6 N/C

102.

If an electron is accelerated from rest through a potential difference of 1 200 V, find its approximate velocity at the end of this process. (e = 1.6 x 10^-19 C; m_e = 9.1 x 10^-31 kg).

a)

1.0 x 10⁷ m/s

b)

1.4 x 10⁷ m/s

c)

2.1 x 10⁷ m/s

d)

2.5 x 10⁷ m/s

103.

In which case does an electric field do positive work on a charged particle?

a)

A negative charge moves opposite to the direction of the electric field.

b)

A positive charge is moved to a point of higher potential energy.

c)

A positive charge completes one circular path around a stationary positive charge.

d)

A positive charge completes one elliptical path around a stationary positive charge.

104.

A 9.0-V battery moves 20 mC of charge through a circuit running from its positive terminal to its negative terminal. How much energy was delivered to the circuit?

a)

2.2 mJ

b)

0.020 J

c)

0.18 J

d)

4.5 x 10³ J

105.

Find the electrical potential at 0.15 m from a point charge of 6.0 µC. (ke = 8.99 x 10⁹ Nm²/C²).

a)

5.4 x 10⁴ V

b)

3.6 x 10⁵ V

c)

2.4 x 10⁶ V

d)

1.2 x 10⁷ V

106.

A parallel-plate capacitor has a capacitance of 20 µF. What potential difference across the plates is required to store 7.2 x 10^-4 C on this capacitor?

a)

36 V

b)

2.2 x 10^-2 V

c)

1.4 x 10^-8 V

d)

68 V

107.

Increasing the separation of the two charged parallel plates of a capacitor, which are disconnected from a battery, will produce what effect on the capacitor?

a)

increase charge

b)

decrease charge

c)

increase capacitance

d)

decrease capacitance

108.

Three capacitors of 1.0 µF, 1.5 µF, and 2.0 µF are connected in series. Find the combined capacitance.

a)

4.5 µF

b)

4.0 µF

c)

2.2 µF

d)

0.46 µF

109.

If three 4.0 µF capacitors are connected in parallel, what is the combined capacitance?

a)

12 µF

b)

0.75 µF

c)

8.0 µF

d)

0.46 µF

110.

Two capacitors with capacitance's of 1.0 µF and 0.50 µF, respectively, are connected in series. The system is connected to a 100 V battery. What charge accumulates on the 1.0 µF capacitor?

a)

150 µC

b)

100 µC

c)

50 µC

d)

33 µC

111.

Two capacitors with C_A greater than C_B and are connected in series with a battery. Which of the following is true?

a)

There is more charge stored on C_A.

b)

There is more charge stored on C_B.

c)

There is the same charge stored on each capacitor.

d)

There is the same potential difference across both capacitors.

112.

What is the equivalent capacitance between points a and b? All capacitors are 1.0 µF.

a)

4.0 µF

b)

17 µF

c)

0.6 µF

d)

0.25 µF

113.

A 0.25 µF capacitor is connected to a 400-V battery. What potential energy is stored in the capacitor?

a)

1.2 x 10^-12 J

b)

1.0 x 10^-14 J

c)

0.040 J

d)

0.020 J

114.

Inserting a dielectric material between two charged parallel conducting plates, originally separated by air and disconnected from a battery, will produce what effect on the capacitor?

a)

increase charge

b)

increase voltage

c)

increase capacitance

d)

decrease capacitance

115.

The dielectric strength of Rutile is 6.0 x 10⁶ V/m, which corresponds to the maximum electric field that the dielectric can sustain before breakdown. What is the maximum charge that a 10 x 10 F capacitor with a 1.0-mm thickness of Rutile can hold?

a)

1.7 µC

b)

0.6 µC

c)

0.3 µC

d)

6.0 µC

116.

A parallel-plate capacitor has dimensions 4.0 cm x 5.0 cm. The plates are separated by a 1.0 mm thickness of paper (dielectric constant k = 3.7). What is the charge that can be stored on this capacitor, when connected to a 1.5 V battery? (Ɛ₀ = 8.85 x 10^-12C²/Nm²)

a)

20 x 10^-12C

b)

4.8 x 10^-12C

c)

4.8 x 10^-11C

d)

9.8 x 10^-11 C

117.

Very large capacitors have been considered as a means for storing electrical energy. If we constructed a very large parallel-plate capacitor of plate area 1.0 m² using paper (k = 3.7) of thickness 1.0 mm as a dielectric, how much electrical energy would it store at a plate voltage of 5 000 V?

a)

0.41 J

b)

90 J

c)

9 000 J

d)

45 000 J

118.

The capacitance of a parallel plate capacitor depends on

a)

the type of metal used

b)

the thickness of plates

c)

the potential applied across the plates

d)

the separation between the plates

119.

The capacitance of a parallel plate capacitor is C . Its capacitance when the separation between the plates is halved will be

a)

4C

b)

2C

c)

C/2

d)

C/4

120.

When a slab of dielectric is introduced between the parallel plates of a capacitor which remains connected to a battery, then charge on the capacitor will

a)

decrease

b)

remain unchanged

c)

increase

d)

depends on the nature of the dielectric introduced

121.

During charging of a capacitor, the variation of its p.d. V with time t is shown as

a)

b)

c)

d)

122.

The energy of a charged capacitor is given by the expression (q= charge on the conductor and C = its capaciance)

a)

$\frac{q^2}{2C}$

b)

$\frac{q^2}{C}$

c)

$\frac{q^{ }}{2C^2}$

d)

$2qC$

123.

Change Q on a capacitor varies with voltage V as shown. The area of triangle OAB represents

a)

capacitance of the capacitor

b)

electric charge on the capacitor

c)

electric field between the plates

d)

energy stored in the capacitor

124.

Three equal capacitors, each with capacitance are connected as shown in figure. Then the equivalent capacitance between and is

a)

C

b)

C/3

c)

3C

d)

3C/2

125.

The equivalent capacitance avross A and B in the figure is equal to

a)

1 $\mu$ F

b)

3 $\mu$ F

c)

2 $\mu$ F

d)

1.5 $\mu$ F

126.

Two capacitors $C_1$ and $C_2$ of capacitances C and 2C respectively are connected in series. A voltage of 6 V is applied across them. The ratio of energy stored in $C_1$ to that of $C_2$ is

a)

1 : 2

b)

2 : 1

c)

1 : 4

d)

4 : 1

REVIEW: Capacitors & Capacitance

Total questions: 126

Worksheet time: 1hrs 23mins

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