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WorksheetsElectromagnet Review
Total questions: 15
Worksheet time: 15mins
What is an electromagnet?
What do two unlike poles do when they are brought close together?
They attract
They repel
Nothing
The arrow on magnetic field lines shows them flowing in which direction?
from South to North
from North to South
from left to right
What is one difference between electromagnets and bar magnets?
Bar magnets can be turned off but electromagnets cannot
Bar magnets have a magnetic field but electromagnets do not
Electromagnets need electricity but bar magnets do not
How can you increase the magnetic field between two bar magnets?
Move them farther apart.
Drop them.
Move them closer together.
Heat them up.
Which of the following properties do all magnets have in common?
North and South Poles
Magnetic field lines.
Strongest at the poles.
Domains are all aligned in one direction.
What property of magnets is demonstrated in this image?
Aligned domains.
Opposites attract.
Field gets weaker the farther you move away from the magnet.
If you cut a magnet in half you get two magnets.
How is the magnetic field of an electromagnet decreased?
Less coils of wire.
Stronger battery.
Longer wire.
Iron core.
What is an electromagnet?
Wire wrapped around a core.
Wire next to a core.
A magnet near a current.
a magnet on top of a current.
If you move a coil of wire near a magnet, what will happen?
current flows in the wire
nothing
a big surprise
the wire will be repelled
Surrounding every magnet is a __________ __________.
magnetic field
electrical current
another magnet
an enemy
What is the primary component needed to create an electromagnet?
A coil of wire
A permanent magnet
A piece of wood
A plastic rod
Which of the following actions will increase the strength of an electromagnet?
Increasing the number of coils
Using a wooden core
Decreasing the current
Using a plastic core
In an experiment, a student wraps a wire around a nail and connects it to a battery. What is the student demonstrating?
The creation of an electromagnet
The creation of a permanent magnet
The principle of magnetic repulsion
The principle of magnetic attraction
Which real-world application uses electromagnets?
Electric motors
Solar panels
Wind turbines
Hydraulic presses
