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Capacitors

Total questions: 25

Worksheet time: 13mins

Name
Class
Date
1.
------------------------ 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
2.
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
3.
The figure to the right represents:
a)
Capacitor
b)
Diode
c)
Inductor
d)
Resistor
4.
With respect to the capacitor, which relationship is true? •
a)
C = Q×V
b)
V = C×Q
c)
V = C×Q
d)
Q = C/V
5.
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
6.
If C= 470μF, V=3V, then
a)
1.71mC
b)
1.51mC
c)
1.61mC
d)
1.41mC
7.
The formula for the energy stored in the capacitor is:
a)
W=(1/2)CV
b)
W=(1/2)C2V
c)
W=(1/2)CV2
d)
W=(1/2)2CV
8.
In the capacitor, greater plate area gives: 
a)
greater capacitance
b)
less capacitance
c)
no change
9.
In the capacitor, closer plate spacing gives: 
a)
less capacitance
b)
no change
c)
greater capacitance
10.
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
11.
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
12.
In a parallel circuit what is split ____ and what is the same ____ between current and voltage?
a)
voltage, current
b)
current, voltage
c)
resistance, voltage
d)
resistance, current
13.

What happens when a parallel plate capacitor is charged with d.c.

a)

Electrons move away from the plate attached to the negative terminal

b)

Electrons move away from the plate attached to the positive terminal

c)

Protons move away from the plate attached to the negative terminal

d)

Protons move away from the plate attached to the positive terminal

14.

If the capacitance of a capacitor is 10F and the voltage applied is 5V, what charge would be stored?

a)

50C

b)

2C

c)

0.5C

d)

1C

15.

As you charge up a capacitor, what happens to the voltage across it?

a)

Increases

b)

Decreases

c)

Stays the same

16.

As you charge up a capacitor, what happens to the current through it

a)

Increases

b)

Decreases

c)

Stays the same

17.

Which factor will affect the initial current through a capacitor in an RC circuit?

a)

The capacitance of the capacitor

b)

The resistance of the resistor

18.

What is the energy stored on a capacitor with capacitance 2F when 10V is supplied

a)

20

b)

50

c)

100

d)

200

19.

What is the energy stored in a 1F capacitor which has 10C of charged stored

a)

10J

b)

50J

c)

0.1 J

20.

Which of these options is not an example of an application of capacitors

a)

Blocking d.c.

b)

photographic flash light

c)

smoothing

d)

reducing the current

21.

What are the units of charge

a)

Coulombs

b)

Joules

c)

Farads

d)

Volts

22.

If 4A of current is passed onto a resistor in 4 seconds, what is the total charge stored?

a)

1C

b)

4C

c)

16C

d)

12C

23.
If the charge on a parallel-plate capacitor is doubled:
a)
the capacitance is halved 
b)
the capacitance is doubled 
c)
the electric field is halved 
d)
the electric field is doubled
24.
The following are factors affecting capacitance, except.
a)
Dielectric in between the metal plates
b)
Area  of the metal plates
c)
Distance of separation of the metal plates
d)
Voltage across the metal plates
25.
Which of the following is not a dielectric?
a)
silicon
b)
germanium
c)
polystyrene
d)
titanium

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