Vocabulary
Attract or Repel
Magnetic Fields
Electromagnet
Random
100
State the definition:
Pole
the end of a magnet
100
Repel
100
In the following picture, the iron fillings show the shape of the magnetic _______________ around the magnet.
magnetic field
100
Is an electromagnet permanent or temporary?
Temporary
100
A magnet has a _________ pole and a _________ pole.
North Pole
South Pole
200
State the definition:
Force
the push or pull on an object
200
Attract
200
Will the paperclips stick to the magnet at spot 2? Why?
Yes, because it is inside the magnetic field. Therefore, the magnet's strength will reach the paperclip.
200
Name 2 items that electromagnets are used in
Fridge, Motor, Computer, Generators, Electric Doorbells, vacuum, washing machine, power-windows, speakers, etc.
200
A magnet is the strongest at it's ______________.
Poles
300
State the definition:
Magnetism
The force that a magnet uses to attract and repel
300
Repel
300
Will the paperclips stick to the magnet at spot 3? Why?
Yes, because the paperclip is inside of the magnetic field. Therefore, the strength of the magnet will reach the paperclip.
300
What three items are needed to make electromagnets?
-Power source
-Iron core
-Wires
300
What materials will stick to a magnet?
iron, nickel, and cobalt
400
State the definition:
Magnetic Induction
The process of creating a new magnet
400
Repel
400
Will the paperclips stick to the magnet at spot 1? Why?
No, because the paperclip is outside of the magnetic field. This means the strength of the magnet will not reach the paperclip.
400
How can you make an electromagnet stronger?
(2)
Wrap more coils or increase the power
400
What's the difference between a permanent and temporary magnet?
Permanent - magnet that will be able to attract or repel for a long period of time (indefinitely)
Temporary - a magnet that will only be able to attract or repel for a short period of time.
500
State the definitions:
Attract
Repel
Attract - pulling something in
Repel - pushing something away
500
Three bar magnets are held together as you see below. What are the magnets going to look like when they are released?
500
What is a magnetic field?
The area around a magnet where it can repel or attract items made of iron, nickel, or cobalt.
500
What is the difference between an electromagnet and a bar magnet?
(Name at least 3)
-E can be turned on or off, bar magnet can't. (It is a temporary magnet vs permanent.)
-E can be made stronger or weaker, a bar magnet can't have it's strength changed.
-E can have it's poles switched, a bar magnet can't.
-E uses electricity to work, a bar magnet does not.
500
How does an electromagnet work?
(2 Steps)
First, you need to build a circuit with an iron core, wires, and a power source. Then, the electric current will produce a magnetic field around the iron core.