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Worksheetsmagnetic fields
Total questions: 102
Worksheet time: 1hrs 26mins
Name
Class
Date
1.
Magnetic field lines are closet together at the __________.
a)
poles
b)
lines
2.
Earth's magnetic poles are in the same place as the geographic poles.
a)
True
b)
False
3.
The effects of a magnetic field can be observed using non-metal fillings.
a)
True
b)
False
4.
Magnets can interact without touching.
a)
True
b)
False
5.
Magnetic field lines always cross.
a)
True
b)
False
6.
The motion of liquid _______ in the Earth's core creates a magnetic field.
a)
Iron
b)
Magnesium
7.
__________ is the angle between geographic north and the north to which a compass needle points.
a)
declination
b)
magnetic force
8.
When the magnetic fields of two or more magnets overlap, a(n) _________ magnetic field forms.
a)
combined
b)
single
9.
A compass behaves as it does because each needle acts as a(n) ___________.
a)
Magnet
b)
Guide
10.
A(n) __________ is a device that has a magnetized needle that can spin freely.
a)
Compass
b)
Magnetic Field
11.
True or False: A magnet is attracting when it pushes objects away from each other.
a)
True
b)
False
12.
A child puts two magnetic toy trains next to each other on a track. What will happen next, and why?
a)
The trains will not move.
b)
The trains will move away from each other.
c)
The trains will move closer to each other.
d)
Not enough information.
13.
A child sets identical magnetic carts on tracks. At the end of each track is a large magnetic train that cannot move. The child uses her hand to slide the carts on each track. Which of these movements will result in the greatest decrease in potential energy?
a)
Moving the cart on Track A one space to the left <
b)
Moving the cart on Track B one space to the left <
c)
Moving the cart on Track B one space to the right >
d)
These movements each have the same change in potential energy because they each move the car the same distance.
14.
A train engineer is working with two identical magnetic roller coaster cars on different sides of a center magnet that cannot move. The engineer can only move one car one space. Which movement will result in the largest increase in potential energy?
a)
Moving the blue car one space toward the center magnet.
b)
Moving the green car one space away from the center magnet.
c)
Moving the green car one space toward the center magnet.
d)
These movements each have the same change in potential energy because they move the roller coaster car the same distance.
15.
A child sets identical magnetic carts on tracks. At the end of each track is a large magnetic train that cannot move. The child uses her hand to slide the carts on each track. Which of these movements will result in the greatest increase in potential energy?
a)
Moving the cart on Track A one space to the left <
b)
Moving the cart on Track B one space to the left <
c)
Moving the cart on Track B one space to the right >
d)
These movements each have the same change in potential energy because they each move the car the same distance.
16.
Which way will the magnets move after they are released?
a)
Towards each other
b)
Away from each other
c)
Not enough information
17.
Why would the two magnets move together?
a)
There is too much force.
b)
The magnets are not touching.
c)
The magnetic force pushes the trains apart.
d)
The magnetic force will pull the trains together.
18.
How can magnets cause objects to have kinetic energy?
a)
A magnetic force can convert kinetic energy stored in a magnetic field to potential energy.
b)
Kinetic energy can convert potential energy stored in a gravitational field.
c)
A magnetic energy can convert potential energy stored in a gravitational field to kinetic energy.
d)
A magnetic force can convert potential energy stored in a magnetic field to kinetic energy.
19.
The ability to make things move or change
a)
Transfer
b)
Energy
c)
Convert
d)
Repel
20.
A train engineer is working with two identical magnetic roller coaster cars on different sides of a center magnet that cannot move. The engineer can only move one car one space. Which movement will result in the largest increase in potential energy?
a)
Moving the blue car one space toward the center magnet.
b)
Moving the green car one space away from the center magnet.
c)
Moving the green car one space toward the center magnet.
d)
These movements each have the same change in potential energy because they move the roller coaster car the same distance.
21.
The energy something has because it is moving
a)
kinetic energy
b)
potential energy
c)
magnetic energy
d)
force
22.
Which picture has the most potential energy?
a)
Picture A
b)
Picture B
24.
The energy that is stored in an object or system
a)
kinetic energy
b)
potential energy
c)
magnetic energy
d)
force
24.
The energy that is stored in an object or system
a)
kinetic energy
b)
potential energy
c)
magnetic energy
d)
force
25.
Which type of energy will be present in the scenario shown below?
a)
Potential
b)
Kinetic
c)
Neither
26.
A train engineer is working with two identical magnetic roller coaster cars on different sides of a center magnet that cannot move. The engineer can only move one car one space. Which movement will result in the largest decrease in potential energy?
a)
Moving the blue car one space toward the center magnet.
b)
Moving the green car one space away from the center magnet.
c)
Moving the green car one space toward the center magnet.
d)
These movements each have the same change in potential energy because they move the roller coaster car the same distance.
27.
Which of the images will show an increase in potential energy stored in the magnetic field?
a)
A
b)
B
28.
How is energy being transferred in the scenario shown below?
a)
Potential --> Kinetic
b)
Kinetic --> Potential
c)
Kinetic --> Kinetic
d)
Neither
29.
Which of the images will show an increase in potential energy stored in the magnetic field?
a)
A
b)
B
30.
A child moves a magnet towards another magnet that cannot move. What happens to the potential energy in the system of magnets?
a)
Potential energy decreases because the blue magnet train moves in the same direction as the magnetic force.
b)
Potential energy decreases because the blue magnet train moves against the magnetic force.
c)
Potential energy increases because the blue magnet train moves against a magnetic force.
d)
Potential energy does not change because the magnets in the system do not change.
31.
How does a system of magnets store potential energy in the magnetic field?
a)
The energy used to move a magnet with (same direction as) a magnetic force.
b)
The energy used to move a magnet against (opposite direction as) a magnetic force.
c)
Magnets get their potential energy from kinetic energy.
32.
A train engineer is working with two identical magnetic roller coaster cars on different sides of a center magnet that cannot move. The engineer can only move one car one space. Which movement will result in the largest decrease in potential energy?
a)
Moving the blue car one space toward the center magnet.
b)
Moving the green car one space away from the center magnet.
c)
Moving the green car one space toward the center magnet.
d)
These movements each have the same change in potential energy because they move the roller coaster car the same distance.
33.
A wire carries a current, creating a magnetic field around itself as shown. The current in the wire is:
a)
Directed to the right
b)
Directed to the left
c)
Equal to the magnetic field
d)
In the same direction as the magnetic field
34.
What does the following represent?
⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗
⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗
⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗
a)
Multiplied by a billion
b)
A piece of modern art
c)
Uniform magnetic field directed into the screen away from you
d)
Uniform magnetic field directed out of your screen at you
35.
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).
36.
The strongest part of a magnet is...
a)
the bars .
b)
the force field.
c)
the poles.
d)
the middle.
37.
A straight wire carrying a 9.0 A current is in a uniform magnetic field oriented at right angles to the wire. When 75 cm of wire is in the field, the force on the wire is 1.2 N. What is the strength of the magnetic field (B)? HINT: F=I.L.B
a)
= 0.18 N
b)
= 0.18 T
c)
= 0.18 Cm
d)
= 0.18
38.
The SI unit of magnetic field is
a)
weber
b)
gauss
c)
tesla
d)
farad
39.
What does the following represent?
⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙
⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙
⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙
⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙
⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙
⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙
a)
A crowd with binoculars
b)
A bunch of coaxial cables
c)
Uniform magnetic field directed into the screen away from you
d)
Uniform magnetic field directed out of your screen at you
40.
Attract
a)
To pull objects close to each other
b)
to push objects away from each other
c)
to change from one type to another
d)
an electric current
41.
electromagnet
a)
a type of magnet in which the magnetic field is produced by an electric current
b)
to push objects away from each other
c)
to pull objects close to each other
d)
the ability to make things move
42.
isolate
a)
to separate or set apart
b)
to come together
c)
to be pushed in the opposite direction
d)
the energy surrounding a magnet
43.
kinetic energy
a)
the energy that an object has because it is moving
b)
the space around a magnet in which magnetic forces can act on objects
c)
one of the two opposite ends of a magnet
d)
the energy that is stored in an object or system
44.
magnetic field
a)
the space around a magnet in which magnetic forces can act on objects
b)
to separate or set apart
c)
one of the two opposite ends of a magnet
d)
to provide evidence that goes against a claim
45.
refute
a)
to provide evidence that goes against a claim
b)
to push objects away from each other
c)
to move from one object to another or one place to another
d)
something that can be changed and may be measured
46.
variable
a)
something that can be changed and may be measured
b)
to move from one object to another or one place to another
c)
a set of interacting parts forming a complex whole
d)
to push objects away from each other
48.
repel
a)
to push objects away from each other
b)
to provide evidence that goes against a claim
c)
an object, diagram, or computer program that helps us
d)
when two objects come close together
48.
repel
a)
to push objects away from each other
b)
to provide evidence that goes against a claim
c)
an object, diagram, or computer program that helps us
d)
when two objects come close together
49.
magnetic pole
a)
an object, diagram, or computer program that helps us understand something by making it simpler or easier to see
b)
the space around a magnet in which magnetic forces can act on objects
c)
one of the two opposite ends of a magnet
d)
the ability to make things move or change
50.
potential energy
a)
the energy that is stored in an object or system
b)
to provide evidence that goes against a claim
c)
a set of interacting parts forming a complex whole
d)
something that can be changed and may be measured
51.
Which way will the magnets move after they are released?
a)
Towards each other
b)
Away from each other
c)
Not enough information
52.
Attract
a)
To pull objects close to each other
b)
to push objects away from each other
c)
to change from one type to another
d)
an electric current
53.
magnetic field
a)
the space around a magnet in which magnetic forces can act on objects
b)
to separate or set apart
c)
one of the two opposite ends of a magnet
d)
to provide evidence that goes against a claim
54.
repel
a)
to push objects away from each other
b)
to provide evidence that goes against a claim
c)
an object, diagram, or computer program that helps us
d)
when two objects come close together
55.
Which of these materials will a Magnet Attract?
a)
Plastic
b)
Iron
c)
Rubber
d)
Wood
56.
A magnet cannot not move which of the following objects?
a)
a paper clip
b)
a nail
c)
a toothpick
d)
a staple
57.
Why does a compass needle point north?
a)
The compass is a bar magnet
b)
Because north is up
c)
Because it's magic
d)
It lines up with the Earth's magnetic field
58.
Magnetic force between two magnets gets weaker the more ________________ between them.
a)
distance
b)
attraction
c)
metal
d)
lightsabers
59.
What areas of a magnet have the strongest magnetic effect?
a)
the middle
b)
the poles
c)
the sides
d)
the magnetic field lines
60.
Magnetic poles that are unlike ________and magnetic poles that are alike ___________.
a)
run; stay
b)
attract; repel
c)
stay; repel
d)
repel; attract
61.
What is a magnetic field?
a)
purple lines with arrows
b)
area of magnetic force around a magnet
c)
it's like a really big football field
d)
area of a magnet around a magnetic force
62.
The SI unit of magnetic field is
a)
weber
b)
guass
c)
tesla
d)
farad
63.
What kind of magnet can be turned on and off?
a)
refridgerator magnet
b)
electromagnet
c)
ferromagnet
d)
semimagnet
64.
There are several modern uses of magnets. Magnets allow high speed trains to ______________________ above the track. They go faster because without touching the tracks there is no friction to slow them down.
a)
collide
b)
levitate
c)
attract
d)
repair
65.
Why does each electron in an atom behave like a tiny magnet?
a)
The spinning of an electron produces a magnetic field.
b)
The spinning of an proton produces a magnetic field.
66.
What happens when two north poles of a magnet are placed together?
a)
they repel
b)
they attract
c)
they cancel each other out
d)
the strength of the magnet is doubled
67.
A north pole and a south pole will attract.
a)
True
b)
False
68.
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
69.
True or False: All metals stick to magnets.
a)
True
b)
False
70.
What will happen if two bar magnets are put together like this?
a)
do nothing
b)
break
c)
repel
d)
attract
71.
Earth acts like a giant magnet because its center is made up MOSTLY of
a)
granite
b)
limestone
c)
iron
d)
nickel
72.
Is a penny magnetic?
a)
Yes
b)
No
73.
Look closely at the magnetic field lines. Will these magnets attract or repel?
a)
Attract
b)
Repel
74.
Magnets have a north and a south ___________
a)
shape
b)
color
c)
pole
d)
region
75.
A magnet cannot not move which of the following objects?
a)
a paper clip
b)
a nail
c)
a toothpick
d)
a staple
76.
When two magnets attract, they ______________
a)
push apart
b)
change color
c)
get colder
d)
pull together
77.
When two magnets repel, they ________________
a)
change color
b)
pull together
c)
push apart
d)
get colder
78.
The needle of a compass always points to which direction?
a)
south
b)
east
c)
west
d)
north
79.
A device that uses a free-moving magnetic needle to show direction is a:
a)
lodestone
b)
magnet
c)
compass
d)
magnetic field
80.
Which of the following is true of a bar magnet?
a)
Its magnetic field is strongest near its center.
b)
It is surrounded by a magnetic field.
c)
The north pole is stronger than the south pole.
d)
The south pole is stronger than the north pole.
81.
How will these trains move when released?
a)
Together
b)
Apart
82.
What happens when two north poles of a magnet are placed together?
a)
they repel
b)
they attract
c)
they cancel each other out
d)
the strength of the magnet is doubled
83.
A north pole and a south pole will attract.
a)
True
b)
False
84.
Looking at the field lines in this picture, these two magnets are ________
a)
Attracting
b)
Repelling
c)
Attracting and Repelling
d)
Doing nothing
85.
What is the shape of a magnetic field around a wire?
a)
b)
c)
d)
86.
What is the shape of a magnetic field around a solenoid?
a)
b)
c)
d)
87.
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
88.
The area of magnetic force around a magnet is known as its _____________.
a)
magnetic field
b)
magnetic declination
c)
magnetic fan lines
d)
magnetic tan lines
89.
A coil of wire with a current is called a _______. The two ends of this act like the poles of a magnet. It is a weaker electromagnet.
a)
compass
b)
bar magnet
c)
solenoid
d)
circuit
90.
What is a solenoid?
a)
A coil of wire with current flowing through it
b)
A type of bar magnet
c)
A single straight wire
d)
One loop of a wire
91.
A _______________ is a current-carrying coil of wire with many loops
a)
electromagnet
b)
solenoid
c)
magnet
d)
compass
92.
The strength of a magnet can be changed by
a)
adding less loops to the coil.
b)
adding more loops to the coil.
93.
The strength of an electromagnet can be affected by
a)
changing the current in the wire
b)
changing the space between the wires
c)
all of the above
d)
none of the above
94.
An example of the best insulator is
a)
copper
b)
salt
c)
plastic
d)
sand
95.
Electrical insulators have _________ resistance to the movement of electrons.
a)
high
b)
low
c)
no
96.
The coil of current-carrying wire with an iron core is called a(n)
a)
ferromagnet
b)
electromagnet
c)
compass
d)
maglev
97.
An electromagnet is a solenoid with an __________ core.
a)
copper
b)
wire
c)
iron
98.
Which of the following best describes this picture?
a)
Pipes and stuff
b)
Magnet
c)
Electromagnet
d)
Resistor
99.
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.
100.
What effect will the south pole of one magnet have on the south pole of another magnet?
a)
Repulsive
b)
Attractive
c)
Combative
d)
No effect
101.
In order for an electromagnet to be formed, an __________ current must pass through a coil of __________ wrapped around an ________ core.
a)
wire, iron, electric
b)
electric, wire, iron
c)
iron, electric, wire
d)
excited, hair, apple
102.
What is most likely to happen when the switch is closed?
a)
A magnetic field should be produced
b)
The nail will rust
c)
The battery will explode
d)
The wire will catch on fire
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