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Chapter 10 Electricity and Magnetism

Total questions: 136

Worksheet time: 2hrs 23mins

Name
Class
Date
1.

Which of these materials is a good insulator?

a)

gold

b)

copper

c)

silver

d)

plastic

2.

In a series circuit, what will happen if the path for the electrical current is broken by a burned out bulb?

a)

The electrical current will stop fllowing and none of the bulbs will light up.

b)

The electrical current will continue flowing and the other bulbs will light up.

c)

The energy source will continue to move the electric charge through the circuit.

3.

In this image of a smoke detector what part of the circuit is the switch?

a)

the battery

b)

the wire

c)

the alarm horn

d)

the test button

e)

the plastic case that covers the smoke detector when it is closed

4.

In this image of a smoke detector what part of the circuit is the energy source?

a)

the battery

b)

the wire

c)

the alarm horn

d)

the test button

e)

the plastic case that covers the smoke detector when it is closed

5.

The resistor in an incandescent lightbulb is called

a)

flourescent

b)

a filament

c)

the Edison

d)

the insulator

6.

Which type of circuit has more than one path for the electrical current?

a)

The series circuit

b)

The parallel circuit

c)

They both have more than one path

d)

Neither circuit has more than one path for the electrical current

7.

Electrical current is either alternating current (AC) which comes through the wires and outlets in your home or

a)

direct current which comes from batteries

b)

direct current which comes from a power plant

c)

continuous currect which is from solar energy

d)

discreet current which comes from batteries

8.

Electric current is defined as

a)

detect electric current

b)

negative terminal to positive terminal

c)

positive terminal to negative terminal

d)

the flow rate of electric charges through a conductor

9.

Electrons flows from

a)

detect electric current

b)

negative terminal to positive terminal

c)

positive terminal to negative terminal

d)

the flow rate of electric charges through a conductor

10.
Electricity that flows in a closed path is called a
a)
path
b)
current
c)
circuit
11.
What is voltage measured in?
a)
Ω (Ohms)
b)
V (Volts)
c)
A (Amps)
d)
W (Watts)
12.
What is current measured in?
a)
Ω (Ohms)
b)
V (Volts)
c)
A (Amps)
d)
W (Watts)
13.
What is resistance measured in?
a)
Ω (Ohms)
b)
V (Volts)
c)
A (Amps)
d)
W (Watts)
14.
How do you calculate voltage?
a)
Current X Resistance
b)
Resistance ÷ Current
c)
Current ÷ Resistance
d)
Measure it with a ruler
15.
How do you calculate current
a)
Resistance X Voltage
b)
Voltage X Resistance
c)
Resistance ÷ Voltage
d)
Voltage ÷ Resistance
16.
How do you calculate resistance?
a)
Voltage X Current
b)
Current ÷ Voltage
c)
Voltage ÷ Current
d)
Current X Amps
17.
What voltage is needed to cause a 2A current flow through a 10Ω resistor?
a)
5V
b)
0.2V
c)
20V
d)
200V
18.
What resistance is needed to cause a 50A current flow because of a 500V battery?
a)
10Ώ
b)
5Ώ
c)
2500Ώ
d)
550Ώ
19.

Electricity is a form of energy involving the flow of atoms.

a)

True

b)

False

20.

What are the two types of electricity?

a)

Static and electrons

b)

Current and voltage

c)

Series and parallel

d)

Static and current

21.

In a circuit diagram, this symbol represents a

a)

switch

b)

multimeter

c)

battery

d)

globe

22.

Which light globe(s) would never light up?

a)

A

b)

B,C,D

c)

A,B,C,D

d)

None

23.

Voltage is the measure of the...

a)

difference in electrical energy between 2 parts of a circuit

b)

amount of electric charge that flows through a circuit

24.

What type of circuit is this?

a)

Series

b)

Parallel

c)

Simple

25.

In a series circuit, how is the brightness of a light globe affected when another globe is connected?

a)

It gets brighter

b)

It stays the same

c)

It gets dimmer

d)

It goes out

26.

Why are Christmas lights wired in parallel?

a)

It is cheaper to make

b)

You can make longer strands

c)

It uses less electricity

d)

If a light breaks, the others keep working

27.

If the current in an electrical circuit is constant, what will happen to the voltage if the resistance is increased?

a)

Voltage will increase

b)

Voltage will decrease

c)

Voltage will stay the same

28.

If you increase the voltage across a resistor, what will happen to the current?

a)

Current will increase

b)

Current will decrease

c)

Current will stay the same

29.

If you increase the size of the resistor and keep the voltage the same, what will happen to the current?

a)

Current will increase

b)

Current will decrease

c)

Current will stay the same

30.
The flow of electricity in a circuit-
a)
current
b)
flow
c)
circuit
31.
____________ stops the flow of electricity.
a)
A conductor
b)
An insulator
c)
A magnet
32.
Two types of circuits are
a)
parallel and magnetic
b)
electromagnetic and series
c)
series and parallel
33.
In a ________ circuit there are multiple paths for the current to take.
a)
Series
b)
Parallel
34.
In a _________ circuit, if one bulb goes out then the entire circuit doesn't work.
a)
Series
b)
Parallel
35.
Identify the conductor below.
a)
cloth rag
b)
plastic bottle
c)
gold ring
36.
What type of circuit is pictured?
a)
series
b)
parallel
37.
What kind of circuit is this?
a)
Series
b)
Consecutive
c)
Parallel
d)
Training
38.
Using the picture above, which letter correctly labels the battery?
a)
A
b)
B
c)
C
d)
D
39.
Using the picture above, which letter correctly labels the switch?
a)
A
b)
B
c)
C
d)
D
40.
Using the picture above, which letter correctly labels the wire?
a)
A
b)
B
c)
C
d)
D
41.
Which of the following provides stored energy to run the circuit?
a)
Battery
b)
Light Bulb
c)
Switch
d)
Wire
42.
Which of the following controls the flow of electricity by opening and closing the circuit?
a)
Battery
b)
Light Bulb
c)
Switch
d)
Wire
43.
Which of the following produces light when part of a complete circuit?
a)
Battery
b)
Light Bulb
c)
Switch
d)
Wire
44.
Which of the following provides the pathway to carry the electricity from component to component? 
a)
Battery
b)
Light Bulb
c)
Switch
d)
Wire
45.
Which kinds of materials make good conductors?
a)
Fabric
b)
Metal
c)
Plastic
d)
Wooden
46.
Which of the following is evidence that energy is present and electricity is flowing?
a)
A component gets hot.
b)
A light bulb shines.
c)
A motor spins.
d)
All of the above.
47.
Which of the following is NOT a source of energy?
a)
D-cell battery
b)
Food
c)
Sun
d)
Wire
48.

How can it be explained that someone's hair can stick to a balloon?

a)

There is static electricity.

b)

There is too much dust in the air.

c)

The person needs to wash his hair.

49.

Opposite charges _______________.

a)

attract

b)

repel

c)

nothing changes

50.

Like charges _______________.

a)

attract

b)

repel

c)

nothing changes

51.

The flow of electric charge in a circuit is called _______.

a)

Heat

b)

Sound

c)

Electric Current

d)

Magnetic

52.

Identify the part of the circuit that is labeled 1.

a)

battery

b)

wire

c)

switch

d)

bulb

53.

Identify the part of a circuit that is labeled 2.

a)

battery

b)

wire

c)

switch

d)

bulb

54.

Identify the part of a circuit that is labeled 3.

a)

battery

b)

wire

c)

switch

d)

bulb

55.

What supplies the energy or power in an electric circuit?

a)

light bulb

b)

wire

c)

battery

56.

If the light is on, the circuit is _________________.

a)

closed

b)

open

57.

If the light is on, the circuit is _________________.

a)

closed

b)

open

58.

If the light is off, the circuit is ______________.

a)

closed

b)

open

59.

What would best complete this circuit?

a)

A wire

b)

A switch

c)

A battery

d)

A light bulb

60.

What object would best complete this circuit?

a)

A battery

b)

a conductor

c)

an insulator

61.

How could you make this circuit work?

a)

Close the switch

b)

Take out the bulbs

c)

Add another battery

d)

Add another bulb

62.

Which of the following best explains an electric current?

a)

An electric current is the flow of positive charges in a circuit.

b)

An electric current is the flow of atoms in a circuit.

c)

An electric current is the flow of electrons in a circuit.

d)

An electric current is the flow of neutrons in a circuit.

63.

Which of the following statements is correct about electrical insulators?

a)

They do not contain any atoms.

b)

Their protons are not allowed to move about freely.

c)

The electrons are not able to move about freely.

d)

They are good at conducting heat only.

64.

An electric kettle is commonly used to heat up water at home. The heating element used is nichrome wire and not copper. Which of the following reasons best explains why nichrome is used instead of copper?

a)

Nichrome conducts more current than copper, so more heat can be generated.

b)

Nichrome has higher resistance than copper, so more heat can be generated.

c)

Nichrome has higher voltage than copper, so more heat can be generated.

d)

Nichrome are cheaper than copper, so it is more economical.

65.

Which of the following electrical appliances does not make use of a variable resistor?

a)

Volume controls in radio

b)

Dimmers in cinemas

c)

Speed control of a toy car

d)

Electric kettle

66.

The instrument that measures electric current is called ___________.

a)

a resistor

b)

a voltmeter

c)

an ammeter

d)

an electrometer

67.
Thicker wires have _______ resistance than thinner wires.
a)
more
b)
less
c)
the same
68.
Which formulas represents Ohm's law?
a)
V=IR
b)
R=IV
c)
I=RV
69.
Which subatomic particles have a positive charge?
a)
neutrons
b)
electrons
c)
protons
70.
Which type of current comes from a battery?
a)
alternating current (AC)
b)
direct current (DC)
71.

Which of these is caused by static electricity?

a)

A magnet attracts a paper clip

b)

Glue holds two pieces of paper together

c)

Socks taken from a clothes dryer stick together

d)

Ice sticks to a car’s windshield

72.

Which choice describes the behavior of an electric charge?

a)

Like charges attract. Unlike charges repel.

b)

Like charges repel. Unlike charges attract.

c)

Like charges attract. Unlike charges attract.

d)

Like charges repel. Unlike charges repel.

73.

Which device or devices could be removed without breaking the electric circuit?

a)

Only the bulb

b)

Only the switch

c)

The battery and the switch

d)

The bulb and the switch

74.

Which MUST be included in an electromagnet?

a)

Electric current

b)

Light bulb

c)

Motor

d)

Switch

75.

An electric circuit contains a battery, a switch, and a bulb. Which of the following will MOST LIKELY happen if you add another battery to the circuit?

a)

The bulb will not shine

b)

The bulb will shine brighter than it did with one battery

c)

The bulb will shine the same

d)

The bulb will shine half as bright as it did with one battery

76.

Like or similar poles on two magnets will __________.

a)

Attract each other

b)

Have no effect

c)

Repel each other

d)

All of these

77.
Magnetism created by an electric current
a)
electricity
b)
electromagnetism
c)
wind energy
78.
The plastic around the wire is
a)
conductor
b)
insulator
c)
decoration
79.
In a parallel circuit the current
a)
makes one circle
b)
stays in one path
c)
splits and goes through two components
80.
An example of a parallel circuit is
a)
the wiring in a house
b)
a flashlight
c)
a single circular path
81.

Copper allows electricity to flow through it, therefore it is a ______________________.

a)

conductor

b)

insulator

82.
Which best describes a parallel circuit?
a)
Electricity flows along one pathway.
b)
The flow of electricity comes from one source. 
c)
Electricity flows along more than one pathway. 
d)
The flow of electricity comes from more than one source. 
83.
Which best describes a series circuit? 
a)
It has two light bulbs. 
b)
The same current flows through both light bulbs. 
c)
It uses a single battery.
d)
The current is divided between the light bulbs. 
84.

A thin strip of metal foil has a negative electric charge. You bring a balloon that also has a negative charge near the foil. What will MOST LIKELY happen?

a)

The foil will bend toward the balloon

b)

The foil will bend away from the balloon

c)

The balloon will cause the foil to have a positive charge

d)

The foil will cause the balloon to have a positive charge

85.

Like or similar poles on two magnets will __________.

a)

Attract each other

b)

Have no effect

c)

Repel each other

d)

All of these

86.
An accumulation of electrons on an object is known as ___________.
a)
current
b)
AC
c)
static electricity
87.
This circuit won't work. What essential part is missing from this circuit?
a)
resistance
b)
source of electric current
c)
conductor
d)
ammeter
88.
The force that pushes the electricity through a circuit is called...
a)
resistance
b)
voltage
c)
current
d)
switch
89.
The flow of electricity through a conductor is called...
a)
resistance
b)
voltage
c)
current
d)
source of electric current
90.
Which circuit (s) are parallel?
a)
A
b)
A and B
c)
B and C
d)
C
91.
Which one will still function if one light bulb goes out?
a)
A-Series
b)
B-Parallel
c)
A-Parallel
d)
B-Seriese
92.
Security alarms are made of _______ circuits because they turn on when the circuit is broken.
a)
Parallel
b)
Series 
c)
Fancy 
93.
If I add more light bulbs to a series circuit what happens?
a)
The current speeds up and the lights get brighter
b)
The current slows down and the lights dim lower
c)
The current speeds up and the lights dim lower
d)
The current slows down and the lights get brighter
94.
water is a______?
a)
conductor
b)
insulator
95.
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
96.
If you replace the paper clip with a plastic spoon, what happens?
a)
The bulb doesn't light
b)
The bulb is dimmer
c)
The wires get hot
d)
There is no change
97.
If you replace the paper clip with a plastic spoon, what is the plastic spoon acting as?
a)
A conductor
b)
A diode
c)
An insulator
d)
A switch
98.
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 broken.
99.

AC stands for __________ current.

a)

alternating

b)

Adjusting

c)

Alarmed

d)

Additional

100.

DC stands for __________ current.

a)

deviating

b)

default

c)

diverging

d)

direct

101.

What do electric charges have in common with magnetic poles? Choose all that apply.

a)

These forces can attract and repel without touching.

b)

These forces can only attract.

c)

As the distance of seperation increases the strength of the force decreases.

d)

Electric charges are not similar to magnetic poles.

102.

Why are not all atoms tiny magnets?

a)

Because, the spins must be in the same direction.

b)

Every spinning electron is not a tiny magnet.

c)

Because, the spins must be in opposite direction.

103.

A north pole of the magnet is brought near a south pole

a)

they will repel

b)

they will attract

c)

so? nothing will happen

104.

A magnetic domain is

a)

a cluster of aligned atoms

b)

a singular aligned atom

c)

a cluster of non-aligned atoms

105.

In order to make an electromagnet, you need

a)

a magnet, a nail, some wires

b)

a battery, a nail, and a magnet

c)

a battery, a coil of wire, and a nail

d)

a loop of wire, contacts, and a battery

106.

The shape of the magnetic field in a current carrying wire is?

a)

concentric circles

b)

concentric ovals

c)

concentric squares

107.

if you break a bar magnet in half

a)

the poles will seperate

b)

You will have two complete magnets

c)

it becomes unmagnetized

108.

magnetic fields run from _________ pole to ___________ pole

a)

North, South

b)

South, North

c)

They do not exist

109.

How many poles does a magnet have?

a)

1 pole

b)

3 poles

c)

2 poles

d)

o pole

110.

Which two of these are not magnetic materials? Tick two.

a)

copper

b)

steel

c)

iron

d)

aluminum

111.

Where is the strongest magnetic field around a bar magnet?

a)

above and below

b)

near the poles

c)

in the middle

d)

on the north pole

112.

A magnetic force becomes weaker as magnets ________.

a)

repel

b)

attract

c)

move together

d)

move apart

113.

True or False: An unrubbed nail will be attracted to a magnet.

a)

True

b)

False

114.

The geographic north of the earth is actually close to the Earth's magnetic _____________ pole

a)

north

b)

south

c)

east

d)

west

115.

A magnet that loses all or most of their magnetic strength quickly

a)

permanent magnet

b)

temporary magnet

c)

superconductor

d)

electromagnet

116.

Permanent magnets are made out of the following materials

a)

Copper, Chromium, and Cobalt

b)

Iron, Cobalt, and Silver

c)

Nickel, Cobalt, and Iron

d)

Copper, Nickel, and Iron

117.

The interaction between the solar wind and the earth's magnetic field

a)

produces light in the upper atmosphere.

b)

would not be possible without auroras.

c)

makes the Earth rotate, like a homopolar motor.

d)

occurs at night, producing auroras.

118.

The area around a magnet is called the .....

a)

attraction zone

b)

work area

c)

magnetic field

d)

hot zone

119.
The picture is an example of an:
a)
Electric circuit
b)
Electromagnet
c)
Electric nail
d)
Electric power cell
120.
Electric current flowing through a wire produces
a)
static electricity
b)
an open circuit
c)
a permanent magnet
d)
a magnetic field
121.
A device that converts electrical energy into mechanical energy
a)
A. electromagnet
b)
B. electromagnetic induction
c)
C. electric motor
d)
D. electromagnetism
122.

Particles with opposite charges ____________ and particles with same (or like) charges ____________.

a)

attract, repel

b)

repel, repel

c)

attract, attract

d)

repel, attract

123.

What would happen with the magnets in the picture above?

a)

They would repel

b)

Nothing

c)

They would attract

d)

They would repel and then attract

124.

Protons have a ____________ charge.

a)

negative

b)

neutral

c)

positive

125.

Electrons have a ____________ charge.

a)

negative

b)

neutral

c)

positive

126.

A _____________ transforms mechanical energy into electrical energy.

a)

generator

b)

electromagnet

c)

circuit

d)

magnetic field

127.
You know this substance is magnetized because
a)
all the domains have right angles
b)
the arrows are drawn in red
c)
the domains are aligned
d)
the domains are random
128.
This substance is
a)
magnetizecd
b)
unmagnetized
c)
positively charged
d)
negatively charged
129.
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
130.
Generators are devices that convert _____ energy into _____ energy.
a)
chemical; mechanical
b)
mechanical; electrical
c)
electrical; mechanical
d)
potential; kinetic
131.

To make this electromagnet stronger you could:

a)

use less wire

b)

have fewer wire coils around the nail

c)

have more wire coils around the nail

d)

use a plastic core

132.
What is true about electricity and magnetic fields?
a)
Electricity is needed to create any magnet.
b)
Electricity always creates a magnetic field.
c)
Electricity is stronger than a magnetic field.
d)
Electricity prevents magnetic fields from occurring.
133.
Are the magnetic field lines in the picture correct?
a)
Yes, because they point from north to south.
b)
No, because they point from north to south (they're supposed to go the other way).
c)
Yes, because the North pole is on the left in all pictures.
d)
No, because the North pole is on the left in all pictures (it's supposed to be on the right).
134.

When running a current through a wire, what do the blue lines represent?

a)

The wire spinning

b)

A magnetic field that was created

c)

Electrons leaving

d)

Electricity

135.

How are electromagnets different from permanent magnets?

a)

magnets can be turned on/off

b)

you can turn an electromagnet on/off

c)

magnets are more powerful

d)

magnets have a North and South pole

136.

What conclusion can you draw from this graph?

a)

As current increases, magnetic strength decreases.

b)

As current increases, magnetic strength increases.

c)

As current decreases, magnetic strength increases.

d)

There is no relationship between current and magnetic strength.

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