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WorksheetsCurrent Electricity
Total questions: 35
Worksheet time: 25mins
Name
Class
Date
1.
An example of a conductor is :
a)
a glass paperweight
b)
a plastic cap
c)
a metal screw
d)
a wooden handle
2.
In a series circuit with 4 bulbs:
a)
a switch is never used
b)
all of the bulbs become dimmer if another bulb is added
c)
There are many paths for electricity to take
d)
the remaining 3 bulbs stay lit if one burns out
3.
An example of an insulator is:
a)
iron
b)
silver
c)
copper wire
d)
rubber
4.
Does this diagram represent a series or parallel circuit?
a)
series circuit
b)
parallel circuit
5.
Does this diagram represent a series or parallel circuit?
a)
series circuit
b)
parallel circuit
6.
Which best describes a parallel circuit?
a)
Electricity flows along one pathway.
b)
The flow of electricity comes from more than one source.
c)
Electricity flows along more than one pathway.
d)
The flow of electricity comes from more than 1 load.
7.
Current is referred to as:
a)
rate of flow of charge through a circuit
b)
rate of flow of amperes
c)
rate of flow of electrons through a circuit
d)
how the energy pushes the charge through the wire
8.
What is this symbol for?
a)
light bulb
b)
switch
c)
battery
d)
resistor
9.
What kind of circuit is this?
a)
Series
b)
Consecutive
c)
Parallel
d)
Training
10.
what is the power of a lamp whose current is 6 A and the voltage across it is 120 V?
a)
120 W
b)
720 W
c)
16 W
d)
10 W
11.
Potential difference is another term for
a)
current
b)
voltage
c)
energy
d)
watts
12.
What does the Greek letter Ω, (i.e. Omega) represent?
a)
amps
b)
volts
c)
watts
d)
ohms
13.
What is the resistance of a 120 volt, 3 amp device?
a)
360
b)
40
c)
4
d)
0.025
14.
In a parallel circuit if one of the light bulbs burns out the rest _________.
a)
stop the flow of electricity
b)
can still light up
c)
will go out
d)
of the light bulbs burn out also
15.
The small particles that travel through a circuit are called_____________.
a)
electrons
b)
dust
c)
wires
16.
3 resistors are connected to a 9 V battery n a series circuit, the first resistor uses 6 V, the second uses 2 V. How much voltage does the third resistor use?
a)
1 V
b)
2 V
c)
3 V
d)
9 V
17.
As the number of resistors increase in a series circuit, the total resistance ___________ and the total current ____________
a)
Increase, decrease
b)
Decrease, increase
c)
Increase, increase
d)
Decrease, decrease
18.
If you increase the voltage of the source in a parallel circuit, what happens?
a)
Current decreases
b)
Current increases
c)
Electrons disappear
d)
Bulbs get dimmer
19.
Pick the correct sentence.
a)
This circuit will work because it is a closed circuit.
b)
Energy will freely flow in this circuit.
c)
This circuit will not work because there is no energy source.
d)
This circuit will not work because there is no switch.
20.
What does the resistance of a wire tell you?
a)
The speed of electron flow through it.
b)
How tough it is for electrons to flow through it.
c)
The amount of energy given to the electrons.
d)
The amount of energy taken away from the electrons.
21.
Does this statement best describe a parallel or a series circuit.
When more light bulbs are added they all remain bright.
When more light bulbs are added they all remain bright.
a)
Parallel circuit
b)
Series circuit
22.
What does the diagram shows?
a)
an open circuit
b)
a close circuit
c)
a short circuit
d)
a long circuit
23.
What is the formula for current?
a)
I = t/Q
b)
I = W/Q
c)
I = Q/t
d)
I = W/t
24.
What does the arrows in the circuit represents?
a)
conventional current
b)
eletromotive force
c)
electron flow
d)
voltage
25.
Define electric current.
a)
It is the work done by the source in driving charges around a complete circuit.
b)
It is a measure of the rate of flow of electric charge through a given cross-section of a conductor.
c)
It is the work done by the source in driving a unit charge around a complete circuit.
d)
It is a measure of the flow of electric charge through a given cross-section of a conductor.
26.
What does a watt measure?
a)
the amount of thermal energy something has
b)
the electrical pressure that moves electrons
c)
the amount of electricity a devices uses per second
d)
the rate at which an electric current flows
27.
Determine the resistance of the light bulb.
a)
0.25 Ω
b)
1 Ω
c)
2 Ω
d)
4 Ω
28.
What is the formula for current?
a)
I = t/Q
b)
I = Q/t
c)
I = W/Q
d)
I = W/t
29.
What does the arrows in the circuit represents?
a)
conventional current
b)
electron flow
c)
eletromotive force
d)
voltage
30.
In a series circuit, the more lightbulbs you add the brighter they get.
a)
False
b)
True
31.
Does this diagram represent a series or parallel circuit?
a)
series circuit
b)
parallel circuit
32.
What 'flows' in a wire?
a)
Protons
b)
Neutrons
c)
Atoms
d)
Electrons
33.
What is the voltage drop across the 36 ohm resistor?
a)
12V
b)
3V
c)
0.33V
d)
24V
34.
A circuit is shown below. Which of the following is true of this circuit?
a)
It is series and therefore both resistors have the same voltage
b)
It is series and therefore both resistors have the same current
c)
It is parallel and therefore both resistors have the same voltage
d)
It is parallel and therefore both resistors have the same current
35.
Resistors R1 and R2, connected in parallel, have an equivalent resistance of 6 ohms when connected in the circuit shown below. The resistance of R1 could be
a)
1 ohm
b)
4 ohms
c)
5 ohms
d)
8 ohms
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