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Capacitance and Capacitors

Total questions: 30

Worksheet time: 26mins

Name
Class
Date
1.
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 
2.
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
3.
------------------------ 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
4.
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
5.
The figure to the right represents:
a)
Capacitor
b)
Diode
c)
Inductor
d)
Resistor
6.

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

7.
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
8.

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

9.

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

10.

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

11.

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

12.

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, εr >1

b)

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

c)

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

d)

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

13.
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
14.
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
15.
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
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 potential difference between the plates?

a)

2.00x104V

b)

1.75x104 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.

17.

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

18.

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

19.

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

a)

True

b)

False

20.

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

a)

True

b)

False

21.

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

22.

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

23.

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

24.

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

25.

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

26.

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

a)

battery

b)

circuit

c)

switch

d)

capacitor

27.
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
28.
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
29.
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
30.

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

a)

1.33μF

b)

0.75μF

c)

6μF

d)

2μF

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