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Electricity and Magentism

Total questions: 123

Worksheet time: 2hrs 6mins

Name
Class
Date
1.

The tendency for a material to oppose the flow of electrons is _____.

a)

current

b)

resistance

c)

conductor

d)

voltage

2.

Items with opposite charges _____ each other.

a)

attract

b)

repel

c)

move

d)

none of the above

3.

Items with like charges _____ each other.

a)

attract

b)

repel

c)

move

d)

none of the above

4.

Clothes clinging together and lightning are examples of _____.

a)

current electricity

b)

circuit electricity

c)

alternating electricity

d)

static electricity

5.

Resistance is measured in a unit called _____.

a)

ampere

b)

ohm

c)

volt

d)

coulomb

6.

Potential difference is measured in a unit called _____.

a)

ampere

b)

ohm

c)

volt

d)

coulomb

7.

Electric current is measured in a unit called _____.

a)

ampere

b)

ohm

c)

volt

d)

coulomb

8.

Is the symbol for _____.

a)

Light bulb

b)

Resistor

c)

Battery

d)

Switch

9.

Is the symbol for _____.

a)

Light bulb

b)

Resistor

c)

Battery

d)

Switch

10.

A good conductor is a material that does not allow electricity to flow through it.

a)

True

b)

False

11.

A battery is a source of alternating current.

a)

True

b)

False

12.

In a series circuit, all parts of the circuit are connected in a single path.

a)

True

b)

False

13.

Select the items needed to have a complete circuit.

a)

Energy source (battery)

b)

Wires

c)

Energy user (lightbulb)

d)

Voltmeter

e)

Switch

14.

Which of the following are examples of conductors?

a)

Copper

b)

Plastic

c)

Glass

d)

Aluminum foil

e)

Pencil lead

15.

Which of the following are examples of insulators?

a)

Copper

b)

Plastic

c)

Glass

d)

Aluminum foil

e)

Pencil lead

16.

Electricity that flows in only one direction is called _____.

a)

Alternating current (AC)

b)

Direct current (DC)

17.

Electricity that changes direction as it flows is called _____.

a)

Alternating current (AC)

b)

Direct current (DC)

18.
The only charges that can move from one object to another are___________ charges.
a)
electric
b)
neutral
c)
positive
d)
negative
19.

Which of the following charge pairs would repel each other? (Choose all that apply)

a)

positive and negative

b)

negative and negative

c)

positive and positive

d)

negative and positive

20.
If the battery produced 12.6 Volts and what would be the current flow be for a 6 Ohm resistor
a)
2.1 Amps
b)
2.4 Amps
c)
1.71 Amps
d)
15 Amps
21.
What voltage is needed to cause a 2A current flow through a 10Ω resistor?
a)
5V
b)
0.2V
c)
20V
d)
200V
22.
Electricity that flows in a closed path is called a
a)
path
b)
current
c)
circuit
23.

What type of circuit is this?

a)

Series

b)

Parallel

c)

Simple

24.
What type of circuit is pictured?
a)
series
b)
parallel
25.

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

a)

It gets brighter

b)

It stays the same

c)

It gets dimmer

d)

It goes out

26.
In a ________ circuit there are multiple paths for the current to take.
a)
Series
b)
Parallel
27.
In a _________ circuit, if one bulb goes out then the entire circuit doesn't work.
a)
Series
b)
Parallel
28.

Select the materials that are electrical conductors.

a)

b)

c)

d)

e)

29.

Select the materials that are electrical insulators.

a)
b)
c)
d)
e)
30.

The accumulation of excess electric charge on an object is called

a)

Static Electricity

b)

Electric Discharge

c)

Resistance

d)

Current Electricity

31.

Two balloons are hanging from a stick.

Both balloons have a positive charge.

How would you expect the balloons to move?

a)

there would be no movement

b)

towards each other

c)

away from each other

32.

Two balloons are hanging from a stick.

One balloon has a positive charge and the other has a negative charge.

How would you expect the balloons to move?

a)

there would be no movement

b)

towards each other

c)

away from each other

33.

The ball on the string is being repelled (pushed away) by the metal bar.

What must be the charge on the ball?

a)

positive

b)

neutral

c)

negative

34.

An area over which an electric charge is exerted is called an

a)

conductor

b)

insulator

c)

circuit

d)

electric filed

35.

The comb has been rubbed with a piece of wool fabric and placed next to some scraps of paper.

Some paper moves toward the comb. The movement of the paper is caused by

a)

static electricity

b)

mechanical energy

c)

chemical energy

d)

magnetic attraction

36.

Materials that electrons do NOT flow through such as cloth, rubber, plastic

a)

conductors

b)

insulators

c)

chargers

d)

electrodes

37.

Materials through which electrons flow easily

a)

conductors

b)

insulators

c)

electrodes

d)

chargers

38.

A steady flow of electrons

a)

circuit

b)

current

c)

discharge

d)

oxidation

39.

A continuous conducting path for current.

a)

electrode

b)

circuit

c)

voltaic pile

d)

axon

40.

Electrons move towards the point of ________________ potential.

a)

higher

b)

lower

41.

When dealing with batteries, the negative side is the higher potential.

a)

True

b)

False

42.
A battery or other device which provides energy for a circuit
a)
Conductor
b)
Power source
c)
Parallel circuit
d)
Complete circuit
43.
a)
Series circuit
b)
Incomplete circuit
c)
Parallel circuit
d)
Power source
44.
a)
Power source
b)
Closed circuit
c)
Insulator
d)
Open circuit
45.
a)
Parallel circuit
b)
Series circuit
c)
Incomplete circuit
d)
Switch
46.

A region around a charged particle that can exert a force on another charged particle is called an

a)

electric force.

b)

electric pulse.

c)

electric field.

d)

electric charge.

47.

Charging by ____ occurs when electrons are transferred from one object to another by DIRECT contact.

a)

conduction

b)

induction

c)

friction

48.
What will happen when these magnets are brought close together?
a)
They will attract each other.
b)
They will repel each other.
c)
Both magnets will turn to the left
d)
Both magnets will turn to the right
49.
Where is the force of attraction the strongest on a magnet?
a)
at the poles
b)
in the middle
c)
above the magnet
d)
below the magnet
50.

The entire region surrounding a magnet is known as the:

a)

Magnetic Domain

b)

Lodestone

c)

A Compass

d)

Magnetic Field

51.

Which metal can be attracted to magnets?

a)

Copper

b)

Aluminum

c)

Iron

d)

Gold

52.
Where are the magnetic force the strongest in this picture?
a)
Location 1
b)
Location 2
c)
Location 3
d)
Location 4
53.

Which type of magnet loses magnetism outside of a magnetic field?

a)

a strong magnet

b)

a temporary magnet

c)

a permanent magnet

d)

an electromagnet

54.

Two like poles are held close to one another within each other's force field. Which statements are TRUE? SELECT ALL THAT APPLY.

a)

The poles will repel when released

b)

The poles will attract when released

c)

The poles have high PE before being released

d)

The poles have low PE before being released

55.

Magnetic field lines that are drawn closer to each other show ___.

a)

a decrease in polarity

b)

an increase polarity

c)

a smaller magnetic force

d)

a greater magnetic force

56.

Which answer describes the pictures correctly?

a)

Both drawings show attraction of magnetic forces.

b)

The left drawing shows repulsion and the right drawing shows attraction of magnetic forces.

c)

Both drawings show repulsion of magnetic forces.

d)

The left drawing shows attraction and the right drawing shows repulsion of magnetic forces.

57.
Electricity can be used to create a magnet
a)
True
b)
False
58.
A Magnet can be used to create electricity
a)
True
b)
False
59.
You can make an electromagnet stronger by...
a)
increasing the current through the wire
b)
make the iron core bigger
c)
increase the number of loops around the core
d)
All of these
60.

A magnetic field is a field of force that is produced by moving ________ charges.

a)

northern

b)

positive

c)

gravitational

d)

electric

61.

The magnetic ____________ around a bar magnet is shown above.

a)

legs

b)

flowers

c)

field

d)

direction

62.

The Earth produces its own ________ field.

a)

spectrum

b)

electric

c)

magnetic

d)

progressive

63.

A permanent magnet is a material that produces a ___________________ field without any ___________________ magnetic field being present.

a)

electronic, internal

b)

magnetic, internal

c)

magnetic, external

d)

electronic, external

64.

Every magnet has both a _________ pole and a __________ pole.

a)

North, South

b)

East, West

c)

Positive, Negative

d)

Positive, South

65.

Some objects that normally aren't magnetic can become magnetized when connected to a circuit. Items that are magnetized in this way are called ________.

a)

electromagnets

b)

electrons

c)

electrochromic devices

d)

permanent magnets

66.

Probably the most useful thing about electromagnets is that they can be turned ________ and ________.

a)

on, off

b)

positive, negative

c)

north, south

d)

on, negative

67.

If two magnets are close together, the magnetic force will be ________.

a)

smelly

b)

weak

c)

strong

d)

positive

68.
Iron, Nickel and cobalt are all __________________ materials
a)
Shiny
b)
poles
c)
magnetic
d)
cold
69.
True or False: All metals are attracted to magnet.
a)
True
b)
False
70.
Earth acts like a giant magnet because its center is made up MOSTLY of
a)
granite
b)
limestone
c)
iron
d)
nickel
71.
Why does a compass needle point north?
a)

The compass is a special tool made by elves that can always find Santa.

b)
Because north is up
c)
Because it's magic
d)
It lines up with the Earth's magnetic field
72.

Their movement creates an electric current and causes each ___________to act like a microscopic magnet.

a)

proton

b)

neutron

c)

electron

d)

crouton

73.

Moving a magnet next to a wire causes ____________. 

a)

the wire to catch fire

b)

nonmetals to be repelled

c)

a gravity wave

d)

an electric current

74.

The Earth’s magnetic shield protect life from _____________. 

a)

gravity waves

b)

asteroid impacts

c)

aliens

d)

harmful solar radiation

75.

Are like poles or opposite poles facing each other?

a)

like

b)

opposite

76.

Which image has the most potential energy in the system of magnets?

a)

A

b)

B

c)

C

d)

D

77.

Which image has the most potential energy in the system of magnets?

a)

A

b)

B

c)

C

d)

D

78.

When the current stops running through the wire of an electromagnet, the magnetic field that is created

a)

will remain the same

b)

will end

c)

will increase in strength

d)

will stay forever

79.

Which of the following will not make an electromagnet stronger?

a)

a stronger current in the wire

b)

more loops of wire

c)

a switch

d)

wrapping the wire around an object made of iron

80.

A series circuit has ____ path(s) that the electric current can take.

a)

One

b)

Two

c)

More than one

81.

Electricity is the flow of _________.

a)

Protons

b)

Neutrons

c)

Electrons

82.
What kind of circuit is this?
a)
series
b)
parallel
83.

Which statement is true?

a)

Lights in the series circuit are brighter than the parallel.

b)

Lights in the parallel circuit are brighter than the series.

c)

Both circuits have the same brightness

d)

Neither circuit will light the bulbs

84.
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.
85.
This is a picture of a simple electromagnet. How can the electromagnet be made stronger?
a)
Add more coils of wire to the nail.
b)
Use a smaller battery.
c)
Reverse the poles of the magnet.
d)
Remove all the coils and the nail.
86.

What THREE ways are electromagnets different from permanent magnets?

a)

they can be turned off and on

b)

they can increase in strength by increasing the current in the wire

c)

they are smaller in size

d)

they can change which is the north and south pole

87.
What two forces are required for generators and electric motors to work? 
a)
magnetism and thermal 
b)
electricity and thermal 
c)
electricity and magnetism 
d)
magnetism and radiant 
88.
Generators are devices that convert _____ energy into _____ energy.
a)
chemical; mechanical
b)
mechanical; electrical
c)
electrical; mechanical
d)
potential; kinetic
89.

What is the transfer of energy in when you plug in a motor and it spins?

a)

chemical to mechanical

b)

electrical to mechanical

c)

mechanical to electrical

d)

physical to potential

90.

If one of the bulbs in the picture stops working, what will happen?

a)

All of the bulbs will stop working.

b)

The other 2 bulbs will continue to work.

c)

The other bulbs will become brighter.

91.
According to Ohm’s law, resistance is equal to voltage divided by
a)
time
b)
conduction
c)
current
d)
potential
92.
The unit of measure for voltage is the 
a)
Volt
b)
Amp
c)
Ohm
93.
The unit for resistance is the 
a)
ohm
b)
amp
c)
volt
d)
cenitmeter
94.
Electrical energy is transformed into mechanical energy in a................
a)
electric motor
b)
solenoid
c)
electromagnet
d)
transformer
95.

A device used to open and close a circuit

a)

Button

b)

Switch

c)

Operator

d)

All of the Above

96.

The region in which a magnetic force acts is called a

a)

line of force

b)

pole

c)

magnetic field

d)

field of attractio

97.

An example of a ferromagnetic material is

a)

copper

b)

wood

c)

cheese

d)

nickel

98.

A coiled wire, that carries current is called

a)

an electromagnet

b)

a solenoid

c)

a compass

d)

a ferromagnet

99.

Earth acts like a magnet because its core contains

a)

molton carbon

b)

solid nickel and iron

c)

rocks

d)

molten nickel and iron

100.

Conduction is the transfer of electric charges by

a)

interaction of electric fields

b)

direct contact

c)

rubbing

d)

jumping

101.

An example of static discharge would be

a)

using a compass

b)

an elecromagnet

c)

a lightning bolt

d)

rain

102.

Which position of the two magnets results in the greatest attraction between them?

a)

A

b)

B

c)

C

d)

D

103.

Charging by rubbing is called

a)

friction

b)

induction

c)

conduction

d)

polarization

104.

Current, or the flow of charge through a wire is measured in

a)

volts

b)

amps

c)

Joules

d)

Newtons

105.

This is a measure of electrical resistance

a)

Current

b)

Volt

c)

Ohms

d)

Ampere

106.

Students attached both ends of a long wire to the poles of a battery and wrapped the wire around a spoon. In this arrangement, the spoon is able to pick up five paper clips. The students wrap more wire around the spoon and want to determine if the strength of the magnetic force has increased. Which of the following observations would indicate that wrapping more wire has increased the strength of the electromagnet?

a)

More wire was needed to wrap around the spoon.

b)

The spoon now picks up seven paper clips.

c)

Eventually, the battery runs out of energy.

d)

The ends of the wire must touch the battery's poles.

107.

Students want to investigate how the amount of electric energy delivered to a motor affects its speed. Which of the following procedures will most likely produce the data students need to answer their question?

a)

Measure the rotations per second of a motor when it is connected to one battery, two batteries, and three batteries.

b)

Add larger and larger motors to a battery to determine the size of the largest motor the battery is able to run

c)

Closely observe the rotation of the motor to see if the direction of spin reverses when the poles of the battery are switched

d)

Connect a series of motors to the same battery to figure out how many motors can be run off the same battery.

108.

The illustration shows a hand generator. Turning the handle of the generator spins a magnet and creates an electric current that lights the bulb. Which of the following observations can be used to indicate the strength of the current created by the generator?

a)

The brightness of the bulb

b)

The size of the magnet

c)

The length of the handle

d)

The mass of the generator

109.

What is a current?

a)

A directional flow of electrical charge through an object or medium

b)

Attraction or repulsion that arises between electrically charged particles because of their motion

c)

The size or quantity of something

d)

Attractive or repulsive interactions between any two charged objects

110.

Peter’s teacher tells him that he should not place his electric stereo near the edge of a pool because the water in the pool is a conductor. What does she mean when she says that the water is a conductor?

a)

Water is a type of electrical energy.

b)

Water damages electric circuits.

c)

Electric charges cannot flow without water.

d)

Electric charges move through the water in the pool.

111.

When Bethany walks across a carpet, her socks pick up many negative electric charges. Later in the day, these negative charges are no longer present on her socks. What most likely happened to the negative charges?

a)

The charges disappeared.

b)

The charges transferred to another object.

c)

The charges switched from negative to positive.

d)

The charges broke apart into smaller positive and negative particles.

112.

Current flows from ____potential energy to ____ potential energy.

a)

lower, higher

b)

higher, lower

c)

girl here who

d)

glow her her I

113.

_____ do not allow charge/current to flow.

a)

Coconut Drs

b)

Insulators

c)

Insult oars

d)

Conductors

114.

_____ allow the charge/current to flow.

a)

Coconut Drs

b)

Insulators

c)

Latin sours

d)

Conductors

115.
What essential part of an electric circuit is missing in this picture where the "X" is?
a)
on/off switch
b)
source of energy (electric current)
c)
wires
d)
electrical device
116.
What device is used to create electricity?
a)
resistor
b)
insulator
c)
voltmeter
d)
generator
117.
If all batteries are the same which circuit will have the brightest light bulbs?
a)
A
b)
B
c)
C
d)
D
118.
Which bulb will light?
a)
A
b)
B
c)
C
d)
D
119.
What type of circuit is this?
a)
Series
b)
Open
c)
Parallel
d)
Alternating
120.
Laundry in a clothes dryer often become charged with static electricity while drying. Which of these best explains why a clothes dryer often generates static electricity?
a)
heat from the dryer charges the air and produces lightning
b)

electrons are transferred as clothes rub against each other in the dryer
c)
short circuits in the dryer charge the laundry
d)
clothes with metal pieces conduct electricity in the dryer
121.
Which of the following is an example of static electricity?
a)
a balloon sticking to a wall after it is rubbed with a piece of wool
b)

a magnet sticking to a metal refrigerator door
c)

a ceiling fan turning on after you flip the wall switch
d)

a dry cell battery lighting up a light bulb
122.

This circuit is...

a)

Series

b)

Parallel

123.

If one of the bulbs in this circuit breaks, the other one will...

a)

Go off

b)

Stay on

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