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Grade 9 Electricity

Total questions: 40

Worksheet time: 21mins

Name
Class
Date
1.
What is the voltage of a 60 ohm, 2 amp device?
a)
30
b)
0.033
c)
10.95
d)
120
2.
Resistance is measured in what unit?
a)
ohms
b)
amps
c)
watts
d)
volts
3.
Current is measured in what unit?
a)
ohms
b)
volts
c)
watts
d)
amps
4.
What does the Greek letter Ω,  (i.e. Omega) represent?
a)
amps
b)
volts
c)
watts
d)
ohms
5.
Which of the following is NOT a good insulator?
a)
rubber
b)
wood
c)
iron
d)
plastic
6.
Potential difference is another term for
a)
current
b)
voltage
c)
energy
d)
watts
7.

what is the resistance of a lamp whose current is 6 A and the voltage across it is 120 V?

a)

120 0hm

b)

20 ohm

c)

16 ohm

d)

10 ohm

8.

What is another name for a battery in a circuit?

a)

Load

b)

Cell

c)

Switch

9.
What is another name for a lightbulb in a circuit?
a)
Switch
b)
Load
c)
Power Source
10.

What is another name for the wires in a circuit?

a)

Conductor

b)

Load

c)

Power Source

11.

True or False: Conductors allow electrons to pass through easily.

a)

True

b)

False

12.
Is an eraser a conductor, insulator, or both?
a)
Conductor
b)
Insulator
c)
Both
13.

Is this lightbulb a part of a closed or open circuit?

a)

Closed

b)

Open

14.

Is this switch closed or open?

a)

Closed

b)

Open

15.
What electrical symbol is this?
a)
Lightbulb
b)
Motor
c)
Battery
d)
Switch
16.
What electrical symbol is this?
a)
Open Switch
b)
Closed Switch
c)
Lightbulb
d)
Battery
17.
What electrical symbol is this?
a)
Open Switch
b)
Closed Switch
c)
Lightbulb
d)
Battery
18.
What electrical symbol is this?
a)
Battery
b)
Lightbulb
c)
Switch
d)
Motor
19.
What electrical symbol is this?
a)
Wire
b)
Lightbulb
c)
Battery
d)
Switch
20.

What is another name for the motor in a circuit?

a)

Power Source

b)

Load

c)

Conductor

21.

Does this picture show a closed or an open circuit?

a)

Closed

b)

Open

22.

True or False: A switch turns a circuit on or off.

a)

True

b)

False

23.

Which of the following is NOT required to build a circuit?

a)

Load

b)

Power Source

c)

Conductor

d)

Switch

24.
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
25.
In a simple series circuit, why does the bulb light when you close the switch?   
a)
A. Because the switch produces electricity
b)
B. Because closing the switch completes the circuit
c)
C. Because closing the switch breaks the circuit
26.
What is the difference between a conductor and an insulator?
a)
An insulator allows electricity to flow through it easily and a conductor does not
b)
A conductor allows electricity to flow through it easily and an insulator does not.
c)
An insulator is magnetic and a conductor is not
d)
A conductor is magnetic and an insulator is not
27.
What happens to the brightness of the light bulbs in a series circuit when you add more lights.
a)
Each bulb gets dimmer
b)
Each bulb remains the same
c)
Half of the bulbs get dimmer
d)
Each bulb gets brighter
28.
Does this diagram represent a series or parallel circuit?
a)
series circuit
b)
parallel circuit
29.
Does this diagram represent a series or parallel circuit?
a)
series circuit
b)
parallel circuit
30.
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.
31.
What kind of circuit is this?
a)
series
b)
parallel
32.
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
33.
When there is only one path for electrons to move through it is called a _____. When one light goes out, they all go out. 
a)
closed circuit
b)
parallel circuit
c)
series circuit
d)
open circuit
34.

What is voltage?

a)

the rate of flow of charge

b)

the difference in charge between 2 points

c)

the amount of available charge

35.

What is resistance

a)

the rate at which a charge is flowing

b)

the material's tendency to resist flow of electrons

c)

the difference of charge between 2 points

d)

it is futile

36.
In a series circuit which of the following is the same  throughout the circuit
a)
Resistance
b)
Voltage
c)
Current
d)
None of the above
37.
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
38.
If you decrease the voltage of a series circuit, what happens?
a)
Current decreases
b)
Current increases
c)
Electrons disappear
d)
Bulbs get brighter
39.
If you add a second load to your series circuit, what will happen to the voltage in each load?
a)
Decrease
b)
Increase
c)
Stay the same
40.
Why are homes not wired in series circuits?
a)
The house will burn down
b)
If you turn off one appliance, the rest will turn off. 
c)
Homes are wired in series circuits.

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