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Electricity 1.0 Test bank

Total questions: 127

Worksheet time: 1hrs 21mins

Name
Class
Date
1.
If an object has more positive than negative charges, its electrical charge is...
a)
positive
b)
negative
c)
neutral or no charge
d)
opposite
2.
If you rub a glass rod with a piece of silk, the rod becomes positively charged. This means that
a)
friction destroyed electrons in the rod.
b)
the silk has become negatively charged.
c)
protons have moved to the rod.
d)
glass attracts more protons.
3.
True or False
Like charges repel
a)
True
b)
False
4.
Objects that have opposite charges
a)
are attracted to each other, and the force between the objects pulls them together.
b)
are attracted to each other, and the force between the objects pushes them apart.
c)
are repelled by each other, and the force between the objects pulls them together.
d)
are repelled by each other, and the force between the objects pushes them apart.  
5.
Static electricity is 
a)
The balance of electrical charge on an object
b)
The imbalance of electrical charge on an object
c)
The discharge of electrical charge
d)
The build up of protons in the nucleus of an atom 
6.
What is the major difference between static electricity and current electricity?
a)
Current electricity involves a continuous flow of neutrons; static electricity is a sudden transfer of protons
b)
Current electricity can be deadly; static electricity is almost always safe
c)
In current electricity, there's a single transfer of electrons; in static electricity, there's a steady flow of electrons
d)
Current electricity involves a flow of electrons; static electricity involves a single transfer of electrons
7.

Ms Pippin rubbed two balloons with a piece of wool. What will happen when the balloons are brought near each other?

a)

The balloons will repel each other.

b)

The balloons will attract each other.

c)

The balloons will become positively (+) charged.

d)

The balloons will pop.

8.
If a substance has a higher number of electrons than protons on its surface, what type of charge does it have?
a)
A positive charge.
b)
A negative charge.
c)
A neutral charge
d)
No charge at all
9.

Will the balloons ATTRACT or REPEL each other?

a)
b)
10.

Will the balloons ATTRACT or REPEL each other?

a)
b)
11.

Will the balloons ATTRACT or REPEL each other?

a)
b)
12.

What happens when you touch a metal doorknob after rubbing your shoes on the carpet?

a)

The doorknob sends a burst of electric current into your body

b)

Millions of electrons go from your finger into the doorknob

c)

The doorknob sends millions of electrons into your finger

d)

Your finger becomes negatively charged

13.
Which of the following is caused by static electricity?
a)
a stove getting hot when it is turned on
b)
a magnet being attracted to a refrigerator
c)
a lightning strike during a storm
d)
a light bulb coming on when a switch is turned on
14.
Electrical charge built up on the surface of an object is called _________________.
a)
static electricity
b)
current electricity
c)
lightning
d)
electrons
15.
Static charges build up when
a)
protons move within an object
b)
electrons move within an object
c)
neutrons move within an object
d)
the nucleus moves within an object
16.
The girl's hair and the comb are attracting  one another.  The hair and the comb have
a)
opposite charges
b)
like charges
17.
a flow of electric charge
a)
static electricity
b)
electrical field
c)
electric current
d)
electrical charge
18.

Static electricity can "jump" from the charged object to another object, causing . . .

a)

static cling (objects sticking together)

b)

electric discharge (and a shock!)

19.

When a balloon is rubbed on your hair, both become charged because

a)

positive charges are transferred from one object to another

b)

electrons are transferred from one object to another

c)

both objects gain positive charges

d)

both objects gain electrons

20.

According to the illustration, the charge on Object A is ______________, and the charge on Object B is ______________.

a)

negative, positive

b)

positive, negative

c)

positive, positive

d)

negative, negative

21.

If you rub a balloon on a sweater, the balloon will stick to the sweater. Which of the following explains this?

a)

Rubbing the balloon on the sweater builds up negative charges on the balloon. The balloon is then attracted to the positive charges on the sweater.

b)

Rubbing the balloon on the sweater builds up negative charges on the balloon. The balloon is then attracted to the negative charges on the sweater.

c)

Rubbing the balloon on the sweater takes all of the charges out of both the balloon and the sweater, therefore they stick together.

d)

Rubbing the balloon on the sweater builds converts all of the protons and neutrons on the balloon and sweater into neutrons, and all of these neutrons stick together.

22.

Why does a Van de Graaff generator make your hair stand up if you touch the dome?

a)

The current is trying to flow out of the hair ends.

b)

The electrons gather on the hair ends and repel each other.

c)

The hair is repelled by the dome of the Van de Graaff generator.

d)

The hair is attracted to the surrounding air.

23.

What is an electric current?

a)

a build up of electrons

b)

the difference in charge between 2 points

c)

the flow of electrons over a circuit

d)

the opposition to flow of electrons

24.

What is the current in an electric circuit?

a)

The energy of the circuit

b)

The flow of electrons in the circuit

c)

The power of the circuit

25.

Which of the following is NOT required for a circuit to be complete.

a)

Load

b)

Power Source

c)

Conductor

d)

Switch

26.
What is another name for a lightbulb in a circuit?
a)
Switch
b)
Load
c)
Power Source
27.

What is another name for the wires in a circuit?

a)

Conductor

b)

Load

c)

Power Source

28.

What part of a circuit is this object?

a)

energy source

b)

load

c)

pathway

d)

switch

29.
What is another name for a battery in a circuit?
a)
Load
b)
Power Source
c)
Switch
30.

Does this diagram show a closed or open circuit?

a)

Closed

b)

Open

31.
What is a switch's function in a circuit?
a)
to make the current hotter or colder
b)
turn on and off the flow of current
c)
the pathway that current flows
d)
to add more power to the circuit
32.

Which statement is true?

a)

The light bulb will light up because the circuit is complete.

b)

The light bulb will light up because the circuit is broken.

c)

The light bulb will not light up because the circuit is complete.

d)

The light bulb will not light up because the circuit is open.

33.

What is this symbol?

a)

Ammeter

b)

Wire

c)

Bulb

d)

Voltmeter

34.
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
35.
Materials that tightly hold on to their electrons are considered 
a)
Good conductors
b)
Good insulators
c)
Good anti-static agents
d)
Useful for storing charge
36.
Materials that easily loose or accept electrons are considered
a)
Good conductors
b)
Good insulators
c)
Good anti-static agents
d)
Good for storing charge
37.
The plastic covering is there to:
a)
Provide a conductor for electrical energy to flow.
b)
Provide an insulator so that electrical energy will not pass outside of the wires.
c)
Provide a conductor so that electrical energy can NOT flow.
d)
Provide an insulator so that electrical energy can flow.
38.

What is the purpose of a lightning rod?

a)

So birds won't sit on the roof

b)

To look cool

c)

To safely send electric charges from lightning into the ground

39.

A student is testing the conductivity of 4 different substances. He uses a 2.5 V battery and records the current in the circuit in each of the 4 substances. The chart below indicates the current measured.

Which substance is most likely an insulator?

a)

Substance Q

b)

Substance R

c)

Substance S

d)

Substance T

40.
a switch that automatically opens if the current in the circuit is too high
a)
parallel circuit
b)
circuit breaker
c)
series circuit
d)
load
41.
It is much safer to pull an electrical cord by pulling the cord instead of the plug.  
a)
True
b)
False
42.

What is a device that contains a thin strip of metal that melts if there is too much current through it called?

a)

third prong

b)

circuit breaker

c)

fuse

d)

short circuit

43.

What connects any metal pieces of an appliance to the ground wire of the building?

a)

third prong

b)

fuse

c)

circuit breaker

d)

short circuit

44.

Without a fuse or circuit breaker, what might happen in a house with an overloaded electric circuit?

a)

the thin piece of metal would melt, breaking the circuit

b)

the metal band would heat up, disrupting the circuit

c)

a fire would start

d)

the electricity for the house would turn off

45.

A connection that allows current to take the path of least resistance is a

a)

short circuit

b)

long circuit

c)

parallel circuit

d)

series circuit

46.

What is the difference between a fuse and a circuit breaker?

a)

a fuse can only be used once and a circuit breaker is reusable

b)

a fuse is reusable and a circuit breaker can only be used once

c)

both fuses and circuit breakers can only be used once

d)

both fuses and circuit breakers are reusable

47.

Look at the picture above! why is it not allowed?

a)

Because it will make people stumble and hurt

b)

Because it makes the house messy

c)

Because creates the risk of wire overheating from too much energy

d)

Because it incurs huge electricity bills from too much energy

48.

why when our hands are wet, we shouldn't pull out the plug from the sokcet?

a)

Because it will damage electronic equipment

b)

Because it will electrocute if the wet skin touches the socket.

c)

Because it will make the hands slippery

d)

this will make it more difficult to remove the plug from sokcet

49.

You want to build a device that can conduct current, but that will be safe if touched by a person. Which of the following pairs of materials could you use?

a)

glass for the conductor and rubber for the insulator

b)

copper for the insulator and silver for the conductor

c)

sand for the conductor and plastic for the insulator

d)

plastic for the insulator and silver for the conductor

50.

What is an electrolyte?

a)

The liquid part of the electrochemical cell

b)

The metal part of the electrochemical cell

c)

The part that measures the voltage in an electrochemical cell

51.
Current has units: 
a)
kilowatt·hour 
b)
ampere 
c)
coulomb 
d)
volt 
52.
The flow/movement of electric charges 
a)
Voltage
b)
Resistance 
c)
Current 
d)
Circuit 
53.
Voltage is simply defined as...
a)
what 'pushes' electrons
b)
what 'stops' electrons
c)
moving electrons
54.

What is the voltage in an electric circuit?

a)

The power of the electrons

b)

The charge of the electrons

c)

The energy of the electrons

55.

What is a voltmeter?

a)

The liquid part of the electrochemical cell

b)

The metal part of the electrochemical cell

c)

The part that measures the voltage in an electrochemical cell

56.
A primary cell is 
a)
a rechargeable battery
b)
a non-rechargeable battery
c)
a flow of electricity
d)
device that stops the flow of electricity
57.
A secondary cell is
a)
Electricity that flows
b)
recharegable battery 
c)
non-rechargeable battery
d)
electricity that flows
58.
A battery is 
a)
Electricity generated from water
b)
Electricity created from wind
c)
one or more cells that supply energy
d)
Can only be used once
59.
liquid in a battery that allows electrons to move from one metal to the other (fruit juice, vinegar)
a)
Wet Cells
b)
Dry Cells
c)
Electrolyte
d)
Electrodes
60.
2 different metals that lose or gain electrons in a battery (zinc and copper
a)
wet cells
b)
dry cells
c)
electrolytes
d)
electrodes
61.
a type of cell that contains solid or pastelike electrolytes
a)
Wet Cells
b)
Dry Cells
c)
Electrolytes
d)
Electrodes
62.
a cell that has a liquid electrolyte
a)
wet cells
b)
dry cells
c)
electrolytes
d)
electrodes
63.

Which of the following changes to the cell shown above would result in voltage being produced?

a)

Reversing the leads on the voltmeter

b)

Using a greater volume of sulfuric acid

c)

Replacing 5% sulfuric acid with 20% sulfuric acid

d)

Changing one of the electrodes to a zinc electrode

64.

What kind of cell is this?

a)

electrochemical cell

b)

electrolytic cell

65.

What kind of cell is this?

a)

electrochemical cell

b)

electrolytic cell

66.

What kind of cell is this?

a)

electrochemical cell

b)

electrolytic cell

67.

What kind of cell is this?

a)

electrochemical cell

b)

electrolytic cell

68.

What kind of cell is this?

a)

electrochemical cell

b)

electrolytic cell

69.

What was the manipulated variable in this lab?

a)

type of wet cell

b)

acid concentration

c)

voltage

d)

acid concentration vs voltage

70.

What was the responding variable in this lab?

a)

type of wet cell

b)

acid concentration

c)

voltage

d)

acid concentration vs voltage

71.

What is the relationship between acid concentration and voltage?

a)

the the greater the acid concentration the greater the voltage

b)

the the greater the acid concentration the lower the voltage

c)

acid concentration is not related to Voltage

72.
this is the symbol for a _____?
a)
switch
b)
light 
c)
battery
d)
wires
73.

What is this symbol?

a)

Closed Switch

b)

Resistor

c)

Cell

d)

Battery

74.

What is this symbol?

a)

Wire

b)

Bulb

c)

Buzzer

d)

Ammeter

75.

What is this Symbol?

a)

Motor

b)

Voltmeter

c)

Ammeter

d)

Buzzer

76.
what is this symbol for?
a)
light bulb
b)
cell
c)
battery
d)
resistor
77.

What is the symbol for a resistor in a circuit?

a)
b)
c)
d)
78.

What is the correct symbol for a light bulb?

a)
b)
c)
d)
79.

Electrons flow only in

a)

series ciruits

b)

parallel circuits

c)

closed circuits

d)

open circuits

80.
What is a switch's function in a circuit?
a)
to make the current hotter or colder
b)
turn on and off the flow of current
c)
the pathway that current flows
d)
to add more power to the circuit
81.
this circuit is .....?
a)
open
b)
parallel
c)
closed
d)
The cutest little circuit evah!
82.
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.
83.

Every circuit MUST have...

a)

A Power Source, Energy User and a Switch

b)

An Energy User, Switch and a Conducting Pathway

c)

A Power Source, Conducting Pathway and a Bulb

d)

A Power Source, Conducting Pathway and an Energy User

84.
Which of the following can work as an energy source?
a)
Battery
b)
Light bulb
c)
Wire
d)
All of them
85.
What is another name for a lightbulb in a circuit?
a)
Switch
b)
Load
c)
Power Source
86.
This circuit has a battery, buzzer, and switch.
When the switch is closed the buzzer will sound because -
a)
the switch gives energy to the battery
b)
the buzzer is made of special plastic
c)
the wires are cooled by the surrounding air
d)
electricity can flow in a complete path
87.

A group of students built the circuit shown above. The lightbulb does not glow. Which statement explains this observation?

a)

The battery is not charged

b)

The lightbulb is not part of a complete circuit

c)

The circuit does not have a switch

d)

The bell uses most of the energy from the battery

88.

Current is...

a)

how fast the electrons are moving

b)

the flow of electrical charge

c)

the power source

d)

the amount of energy gained/lost across two points

89.

Voltage is...

a)

how fast the electrons are moving

b)

the flow of electrical charge

c)

the amount of potential energy each electron has

d)

what opposes the flow of current

90.

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

91.

In this model, the moped riders represent the

a)

power pack

b)

bulbs

c)

flow of charge

d)

ammeter

92.

In this model, the electrical energy carried around the circuit is represented as the

a)

pizza

b)

party goers

c)

party house

d)

roads going back and forth the house

93.

In this model, the pump that pushes water round the system represents the

a)

battery

b)

electricity

c)

voltmeter

d)

bulb

94.

The radiator in the central heating system shown in the model is like the ......... in the circuit

a)

bulb

b)

cell

c)

wire

d)

charges

95.

In this model, the pipes are like ....... they carry ......... round the circuit

a)

wires; voltage

b)

bulbs; current

c)

bulbs; voltage

d)

wires; current

96.

The water has the most energy when it has just left the boiler, and least energy when it returns to the boiler. This statement models the .....

a)

charges which have the most energy when they have just left the cell, and the least energy when they return to the cell

b)

charges which have the least energy when they have just left the cell, and the least energy when they return to the cell

c)

charges being able to move around more easily when the wire is thick

d)

charges having difficulty to move around when the wire is thin

97.

Which part of the model represents the charges moving through the wires.

a)

the coal mine

b)

the wagons

c)

the coal

d)

the factory

98.

The drawing shows a model that can help you think about electricity. Which part of the model represents the energy transferred by the current?

a)

the coal mine

b)

the wagons

c)

the coal

d)

the factory

99.

The coal mine-factory model is changed so that there is a gate across the track as shown. What circuit component does the gate represent?

a)

cell

b)

wire

c)

voltmeter

d)

switch

100.

How was voltage represented in the water analogy?

a)

an electric dam converting water to electricity

b)

the amount of water in a large container (e.g. water tower)

c)

the flow of water through the pipes

d)

turning a faucet on and off

101.

How was current represented in the water analogy?

a)

an electric dam converting water to electricity

b)

the amount of water in a large container (e.g. water tower)

c)

the flow of water through the pipes

d)

turning a faucet on and off

102.

If an electrical circuit were analogous to a water circuit at a water park, then the battery voltage would be comparable to ___________________.

a)

the rate at which water flows through the circuit

b)

the speed at which water flows through the circuit

c)

the distance that water flows through the circuit

d)

the water pressure between the top and bottom of the circuit

e)

the hindrance caused by obstacles in the path of the moving water

103.
What is the unit for resistance?
a)
volts
b)
amps
c)
ohms
d)
watts
104.
What is the unit for current?
a)
volts
b)
amps
c)
ohms
d)
watts
105.
Potential difference is another term for
a)
current
b)
voltage
c)
energy
d)
watts
106.
What is the unit for voltage?
a)
volts
b)
amps
c)
ohms
d)
watts
107.
As the resistance of a circuit increases, the current will...
a)
increase
b)
decrease
c)
stay the same
108.

If you decrease the voltage of circuit, what happens?

a)

Current decreases

b)

Current increases

109.

If the Voltage is increased and the resistance stays the same, Current will

a)

Increase

b)

Decrease

c)

Stay the same

110.

If the Voltage stays the same and Resistance is increased, Current will

a)

Increase

b)

Decrease

c)

Stay the same

111.

Why is a bulb brighter when it is powered by two batteries rather than one?

a)

Because the flow of electricity in the circuit is less

b)

Because the flow of electricity in the circuit is the same

c)

Because the flow of electricity in the circuit is greater

d)

Because the flow of electricity will go backward

112.

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

113.

An electrical circuit is powered by a 12-volt battery and contains a light bulb. The current flowing in the circuit is 20 amps. What is the resistance of the light bulb?

a)

0.6 Ohms

b)

240 Ohms

c)

1.67 Ohms

d)

12 Ohms

114.
What is the Voltage of a circuit that has a resistance of 5 Ω and a current of 2 A?
a)
25 V
b)
10 V
c)
2.5 V
d)
0.4 V
115.
This circuit has a 24 volt battery and the resistor is 8 ohms. How many amps are running through the circuit?
a)
3 Amps
b)
192 Amps
c)
2 Amps
d)
4 Amps
116.
What voltage is needed to cause a 2A current flow through a 10Ω resistor?
a)
5V
b)
0.2V
c)
20V
d)
200V
117.

A 3-V battery sends a current of 0.10 A through a light bulb. What is the resistance of the filament of the bulb?

a)

.033 Ω

b)

30 Ω

c)

.3 Ω

d)

300 Ω

118.

Which of the following has the greatest resistance?

a)

long, thin wires

b)

Short, thick wires

c)

long, thick wires

d)

short, thin wires

119.

Which of the following has the least resistance?

a)

Long, thin wires

b)

Short, thick wires

c)

Long, thick wires

d)

Short, thin wires

120.

Which schematic diagram shows ,

3 bulbs connected in 1 path, controlled by 1 switch and uses a battery as a source of energy.

a)
b)
c)
121.

Which of the following schematic diagrams represents this circuit?

a)
b)
c)
d)
122.

Which one is the circuit diagram of this picture?

a)
b)
c)
d)
123.
Will the light bulb in this circuit light and why/why not?
a)
yes, because it has two batteries
b)
no, because the switch is open
c)
yes, because it is in a circuit
d)
no, because the bulb is burned out
124.

A student builds a circuit made up of a battery, two light bulbs, and a switch. What will the student most likely observe in this circuit?

a)

Light bulb 1 and light bulb 2 will both be on

b)

Light bulb 1 will be off, but light bulb 2 will be on

c)

Light bulb 1 and light bulb 2 will both be off

d)

Light bulb 1 will be on, but light bulb 2 will be off

125.

The diagram shows a series circuit with three lit bulbs. How many of the bulbs will remain lit if the wire is cut a the point shown by the arrow?

a)

0

b)

1

c)

2

d)

3

126.
Is the following photo of an open circuit or closed circuit? 
a)
A closed circuit which allows electricity to flow
b)
An open circuit which does not allow electricity to flow
127.

Look at the diagram. What is the term for "B"?

a)

Conductor

b)

Switch

c)

Transformer

d)

Source

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