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Chapter 7 : Electricity & Magnetism

Total questions: 109

Worksheet time: 1hrs 22mins

Name
Class
Date
1.

Form of energy in the picture

a)

sound energy

b)

electrical energy

c)

heat energy

d)

kinetic energy

2.

Form of energy in the picture

a)

sound energy

b)

electrical energy

c)

heat energy

d)

kinetic energy

3.

Form of energy in the picture

a)

sound energy

b)

electrical energy

c)

heat energy

d)

kinetic energy

4.

Form of energy in the picture

a)

elastic energy

b)

electrical energy

c)

heat energy

d)

kinetic energy

5.

Choose the right energy source for the picture

a)

Wind

b)

Radioactive substance

c)

Water

d)

Sun

e)

Waves

6.

Choose the right energy source for the picture

a)

Wind

b)

Radioactive substances

c)

Water

d)

Sun

e)

Waves

7.

Choose the right energy source for the picture

a)

Wind

b)

Radioactive substances

c)

Water

d)

Sun

e)

Waves

8.

Choose the right energy source for the picture

a)

Wind

b)

Radioactive substances

c)

Water

d)

Sun

e)

Waves

9.

Choose the right energy source for the picture

a)

Wind

b)

Radioactive substances

c)

Water

d)

Sun

e)

Waves

10.

Name of the electric component

a)

Bulb

b)

Rheostat

c)

voltmeter

d)

Dry cell

11.

Name of the electric component

a)

Bulb

b)

Rheostat

c)

voltmeter

d)

Dry cell

12.

Name of the electric component

a)

Bulb

b)

Rheostat

c)

voltmeter

d)

Dry cell

13.

Name of the electric component

a)

Bulb

b)

Rheostat

c)

voltmeter

d)

Dry cell

14.

Atoms that have a positive charge will be ATTRACTED to atoms with a ___________ charge.

a)

positive

b)

negative

c)

neutral

15.

Which of these forces works only by combining electric and magnetic forces?

a)

Magnetic

b)

Electric

c)

Electromagnetism

16.

This force occurs when ions/atoms create attractive and repulsive forces.

a)

Magnetic

b)

Electric

c)

Electromagnetism

17.

This force occurs when there is an attractive and repulsive force between two poles.

a)

Magnetic

b)

Electric

c)

Electromagnetism

18.

In a magnet the opposite poles will ___________.

a)

attract

b)

repel

19.

The magnetic field of a magnet is ____________ further away from the magnet.

a)

stronger

b)

weaker

20.

Electric charges that DO NOT move through a current are known as

a)

Magnetic

b)

Electric

c)

Electromagnetism

d)

Static Electricity

21.

What makes an electromagnet stronger?

a)

greater number of loops

b)

smaller number of loops

c)

decreasing the current

d)

decreasing the voltage

22.

An example of an electromagnet

a)

water bottle

b)

paper

c)

motor

d)

glass

23.

current flowing through a wire is surrounded by a/an

a)

force field

b)

magnetic force

c)

nothing

24.

two type of charges in electric and magnetic forces are

a)

north and south

b)

east and west

c)

positive and negative

d)

beyonce

25.

when electrons all spin in the same direction, they create an invisible force known as

a)

electricity

b)

magnetism

c)

motor

d)

electrons

26.

this force is the attractive and repulsive force between two poles.

a)

electric

b)

magnetic

c)

electromagnetic

27.

electrons have this type of charge

a)

positive

b)

negative

c)

neutral

28.

protons have this type of charge

a)

positive

b)

negative

c)

neutral

29.

when the number of electrons matches the number of protons, the atom's charge is...

a)

positive

b)

negative

c)

neutral

30.

When your hair stands on end, each strand repelling the other, you are experiencing

a)

magnetism

b)

ghosts

c)

static electricity

31.
A pathway for electricity to travel is called___________
a)
current
b)
static electrcity
c)
circuit
d)
circle
32.
A continuous flow of electricity is called_____________
a)
series
b)
circuit
c)
static
d)
current
33.
What kind of circuit is this?
a)
series
b)
parallel
34.
In a parallel circuit if one light bulb goes OUT; then they ALL go out. TRUE OR FALSE?
a)
TRUE
b)
FALSE
35.
What is this?
a)
magnet
b)
electromagnet
c)
series circuit
d)
parallel circuit
36.
How do you make an electromagnet stronger?
a)
Add a motor and/or lightbulbs
b)
Add more light bulbs and/or wire coils
c)
add more wire coils and/or a switch
d)
add more wire coils and/or batteries
37.
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
38.
How are electromagnets different from 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
39.
Why is copper classified as a conductor?
a)
Electric current travels easily through copper.
b)
Copper may gain or lose electric charges.
c)
Copper resists the flow of electrical current.
d)
None of the other answer choices
40.
Why are the wires in electric circuits often coated with plastic?
a)
The plastic carries the electric current.
b)
The plastic keeps the electric current inside the wire.  
c)
The plastic allows the wire to bend into different shapes.
d)
The plastic acts as a switch to turn the electric current on or off.  
41.
Which set of materials could be used to make an electromagnet?
a)
A D-cell battery, a box of paper clips, and a switch
b)
A bar magnet, a copper wire, and a light bulb
c)
A bar magnet, a spool of electrical wire, and an electrical outlet
d)
An iron nail, a spool of electrical wire, and a D-cell battery
42.
What parts make up a typical electric circuit?
a)
A battery, nail, switch, and wire
b)
An energy source, magnet, switch, and wire
c)
An energy source, resistor, switch, and wire
d)
None of the other answer choices
43.
An electromagnet would be most useful for which of these tasks?
a)
Lifting a piano from the street to the fourth floor of a building
b)
Separating a mixture of coins into pennies, nickels, dimes, and quarters
c)
Removing the metal objects from trash at a recycling center
d)
Removing the glass objects from trash at a recycling center
44.
What makes a material a good conductor?
a)
A conductor makes it difficult for electricity to flow through it.
b)
A conductor allows electricity to flow through it.
c)
A conductor transforms electrical energy into other forms of energy.
d)
None of the other answer choices
45.
How do electric charges flow in a circuit?
a)
From one end of the circuit to the other end
b)
From a point in the middle of the circuit to two ends
c)
In a loop around the circuit
d)
All of the other answer choices
46.
Electrons are flowing through the wires of a circuit. Which of these actions will stop the electrons from flowing?
a)
Bend one of the wires without breaking it.
b)
Coat the wires with thick plastic.
c)
Replace the wires in the circuit with thicker wires.
d)
Remove the battery or other power source from the circuit.
47.
In order for electricity to flow, it must follow a(n)
a)
network of wires called a grid. 
b)
complete path called an open circuit.
c)
complete path called a closed circuit.
d)
None of the other answer choices
48.
Jane sees a battery on one table and a light bulb on another table. She may not move either the battery or the light bulb. What does she need to complete a circuit and light the light bulb?
a)
One wire that is twice the distance between the battery and the light bulb
b)
Two wires, each long enough to connect the battery and the light bulb
c)
Another battery that she can place next to the light bulb
d)
Another light bulb that she can place next to the battery
49.
Which of the following best describes an electromagnet?
a)
A magnet created when electric current flows through wire coiled around an
iron bar
b)
A magnet created when wire is wrapped around an iron bar
c)
A magnet that is attracted to anything with an electric current
d)
None of the other answer choices
50.
Catalina wants to make an electromagnet using materials she already has. She plans to wrap the middle of a long piece of wire around an object and then connect the ends of the wire to a battery. Which of the following would be the best object for her to wrap with the wire?
a)
A rolled-up newspaper
b)
A plastic bottle
c)
An iron screw
d)
A glass jar
51.
Look at the picture of an electrical circuit.
Noah thinks that glass is a good electrical insulator. How can he use the electrical circuit to test his claim?
a)
Replace the light bulb with a piece of glass to see whether the glass lights up.
b)
Add a piece of glass to the circuit to see whether it melts.
c)
Replace the battery with a piece of glass to see whether the light bulb still
comes on.
d)
Replace one of the wires with a piece of glass to see if the light bulb still
comes on.
52.
Emma wants to investigate how electricity flows through a circuit. She gathers three pieces of wire, a battery, a light bulb, and a metal switch. First she puts on her safety gloves. Then she uses the wires to fasten together the battery, the light bulb, and the switch. The drawing shows the circuit that Emma makes.
When Emma turns the switch on, the bulb lights up. If Emma replaces the metal switch with one made of plastic, what will happen when she turns the switch on?
a)
That will close the circuit and the bulb will come on.
b)
The circuit will stay open and the bulb will not come on.
c)
That will close the circuit and the bulb will not come on.
d)
The circuit will stay open and the bulb will come on.
53.
Which is one way to increase the strength of an electromagnet?
a)
Coil the wire around an aluminum core
b)
Add more coils of wire
c)
Decrease the amount of electric current
d)
Remove some coils of wire
54.
A washing machine is an example of transforming
a)
electricity into motion energy.
b)
motion energy into electric energy.
c)
electricity into light.
d)
heat into motion energy.
55.
Which of the following uses resistors to transform electricity into heat?
a)
A toaster
b)
A car engine
c)
A gas stove
d)
A wind turbine
56.

What is the name of this device?

a)

electric circuit

b)

generator

c)

electromagnet

d)

electric motor

57.

What is the name of this device?

a)

electric circuit

b)

electric motor

c)

electromagnet

d)

generator

58.

What is the name of this device?

a)

electric circuit

b)

electric motor

c)

generator

d)

electromagnet

59.

What happens in an electromagnet?

a)

Mechanical energy produces an electric field

b)

Mechanical energy transforms into electrical energy

c)

Electrical energy produces a magnetic field

d)

Electrical energy transforms into mechanical energy

60.

When electricity to an electromagnet is stopped, what happens to the strength of the magnet?

a)

The magnetism stays the same

b)

The magnetism decreases

c)

The magnetism increases

d)

The magnetism stops

61.

How would you describe this circuit?

a)

Open

b)

Closed

c)

Efficient

d)

Parallel

62.

What is the role of the generator in this system?

a)

It supplies the original energy source for the system.

b)

It converts the magnetism in the turbine into mechanical energy.

c)

It produces the electrical current using the mechanical energy of the turbine.

d)

It transmits the higher-voltage current throughout the power grid system.

63.

What is part C considered in the circuit?

a)

power source

b)

conductor

c)

load/resistor

64.

In the diagram, what is the function of part B?

a)

It transforms chemical energy into electricity.

b)

It turns the flow of electricity on or off.

c)

It changes electricity into another form of energy.

65.

What might happen to the circuit if one of the lightbulbs was unscrewed?

a)

The circuit would be closed.

b)

Nothing would change.

c)

The circuit would be open.

66.

What is the energy transformation that occurs in the circuit?

a)

electrical → chemical → light

b)

chemical→ electrical → light

c)

light → chemical → electrical

67.

In the circuit shown, explain why there is no magnetic field produced.

a)

The coil of wire is not tightly wrapped

b)

The switch is closed.

c)

The switch is open.

68.

What part of a circuit allows electrical current to flow between the battery and the light bulb?

a)

power source

b)

resistor

c)

conductor

69.

The # of loops around a solenoid (coiled wire) affects the magnetic field strength (measured in gauss). Based on the graph, what is the strength of the magnetic field with 8 loops?

a)

350 gauss

b)

400 gauss

c)

500 gauss

70.

Based on the graph, predict the strength of a 12-loop solenoid.

a)

300 gauss

b)

600 gauss

c)

1200 gauss

71.

What is the difference between the solenoid with 8 loops and the solenoid with 2 loops?

a)

400 gauss

b)

300 gauss

c)

100 gauss

72.

Looking at the graph, what is the dependent variable in this experiment?

a)

magnetic field strength

b)

number of loops

c)

the solenoid

73.

Looking at the graph, what might be a reasonable conclusion based on this data?

a)

Taking loops away from the solenoid gives the magnetic field more strength.

b)

Adding more loops to the solenoid gives the magnetic field more strength.

c)

Adding more loops to the solenoid has no effect on the magnetic field.

74.

A circuit was made, using a battery, wire and light bulb. When the materials were connected, the light bulb did not light up. What might have been a problem with this circuit?

a)

He made a parallel circuit.

b)

There was a gap in the circuit.

c)

Electricity won’t flow without a switch.

75.
A circuit that has two or more paths that electricity can follow
a)
parallel circuit
b)
series cirucit
c)
open circuit
d)
closed circuit
76.
The space in which an electric force acts
a)
static field
b)
resistance
c)
electric field
d)
closed circuit
77.
If one burned out bulb causes all of the lights to fail in a circuit, what might you conclude?
a)
It is a parallel circuit.
b)
A heavier wire is needed.
c)
It is a series circuit.
d)
More batteries are needed.
78.
What is a property of matter that causes objects to attract or repel each other?
a)
compass
b)
electric charge
c)
electric circuit
d)
electric field 
79.
Which of the following  is a characteristic of most electrical conductors?
a)
They can be cut easily.
b)
Positive charges move easily through them.
c)
Negative charges move easily through them.
d)
They are soft and flexible.
80.
Which statement is true about an electromagnet?
a)
It is a permanent magnet.
b)
It is made by wrapping current-carrying wire around an iron core.
c)
It cannot be turned off.
d)
Increasing the number of coils decreases the strength.
81.
A student added another light to an electrical circuit and all the lights became dimmer in the circuit.  What is most likely the cause of the dimmer lights?
a)
The batteries are weak.
b)
The circuit is a parallel circuit.
c)
The light bulbs are hot.
d)
The circuit is a series circuit.
82.

what is the unit for energy?

a)

newton

b)

joule

c)

force

d)

volt

e)

ampere

83.

energy __________ be created and destroyed.

a)

can

b)

cannot

84.

which one is renewable energy?

(there is more than 1 answer)

a)

fossil fuel

b)

water

c)

solar

d)

radioactive substances

e)

wind

85.

what is the energy change for a burning candle?

a)

chemical energy → light energy

b)

chemical energy → heat energy + kinetic energy

c)

light energy → heat energy + chemical energy

d)

chemical energy → light energy + heat energy

86.

what is the name of positive charge?

a)

electron

b)

neutron

c)

proton

d)

nucleus

87.

what is the name of negative charge?

a)

neutron

b)

electron

c)

proton

d)

nucleus

88.

like charges _________ each other.

a)

attract

b)

repel

c)

touch

89.

unlike charges ________ each other.

a)

repel

b)

attract

c)

touch

90.

p is positively- charged.

what charge is Q?

a)

positive

b)

negative

c)

neutral

91.

what is the name of this tool?

a)

insulator

b)

dosimeter

c)

electroscope

d)

microscope

92.

what is the unit for voltage?

a)

ampere

b)

current

c)

volt

d)

resistance

93.

what is the unit for current?

a)

volt

b)

voltage

c)

ohm

d)

ampere

94.

the longer the wire,

the _________ the resistance.

a)

lower

b)

greater

c)

higher

d)

shorter

95.

the higher the resistance,

the ________ the current,

a)

bigger

b)

shorter

c)

lower

d)

higher

96.

the direction of magnetic field moves from the ________ to the ________.

a)

south , north

b)

south , west

c)

north , south

d)

east , west

97.

what is this rule?

a)

left hand rule

b)

left hand grip rule

c)

right hand rule

d)

right hand grip rule

98.

the direction of magnetic field can be shown by a __________.

a)

compass

b)

pin

c)

needle

d)

clock

99.

Diagram 1 shows a negatively charged electroscope. A negatively charged plastic rod is brought near the brass cap of the electroscope. Which of the following can be observed?

a)

The gold foil diverges wider

b)

The gold foil collapses

c)

The position of the gold foil remains unchanged

d)

The gold foil diverges then collapses.

100.

Which of the following shows the correct way of connecting the voltmeter to determine the voltage across the bulb?

a)
b)
c)
d)
101.

Diagram 3 shows the setup of the apparatus to study the pattern of the magnetic field produced by the current flowing in the wires. Which of the following diagrams shows the CORRECT illustration of the magnetic field produced?

a)
b)
c)
d)
102.

Complete the statements below. Choose whether it is [different / same].


Every resistor in the series circuit receives the (a)   amount of current.

103.

Complete the statement below. Choose whether it is [increase / decrease]


Adding a resistor to a parallel circuit (a)   the effective resistance of the circuit.

104.

Based on the table above, which of the following deduces the relationship between the number of turns of a coil and the number of pins attracted?

a)

The lower the number of turns of a coil, the more number of pins attracted

b)

The higher the number of turns of a coil, the lower the number of pins attracted

c)

The higher the number of turns of a coil, the more number of pins attracted

d)

There is no correlation between the number of turns of a coil with the number of pins attracted.

105.

Calculate the effective resistance, R. State the answer to 2 decimal places.

(a)  

106.

Calculate the current, I. State the answer to 2 decimal places.

(a)  

107.

What is the effective resistance in this circuit?

(a)  

108.

What is the voltmeter reading if the current flowing in this circuit is 3 A?

a)

9 V

b)

15 V

c)

5 V

d)

21 V

109.

BONUS Question :

How to spell my name ?

(a)  

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