P3: Magnetism Flashcards
Identify the 2 magnetic poles.
North pole
South pole
North poles ______ North poles
Repel
South poles ______ North poles
Attract
A material that is attracted to a magnet is called a…
magnetic material
Identify the 3 magnetic metals found in the periodic table.
Iron
Nickel
Cobalt
Why is steel magnetic?
It contains iron
The invisible force field that surrounds a magnet is called a…
magnetic field
If a magnetic material is placed in a magnetic field, what happens?
A force acts on the material (push or pull)
Draw the magnetic field lines that represent a magnetic field on the magnet below:
Which 2 methods can we use to observe the magnetic field lines around a magnet?
Iron filings
Plotting compasses can show the shape AND direction of the field lines.
Which direction do the magnetic field lines travel in?
From the North pole to the South pole
What does it mean if the magnetic field lines are close together?
The magneitc field is stronger.
State some uses of electromagnets.
- Maglev trains
- X-Ray machines
- Starting a car engine.
- Scrapyards - lifting cars
- Motors in microwaves (to turn plate)
How are magnets used in maglev trains?
Magnets on the train and tracks repel each other so the train ‘hovers’ so there is no friction between the train and the tracks.
Magnets repel the train forwards so no engine is needed.
How can you make an electromagnet using an iron core, wire, battery to separate a pile of paperclips and bits of paper.
- Wrap the wire around an iron nail.
- Connect it to the battery.
- Iron paperclips will be attracted to the electromagnet, paper will not.
- Move the electromagnet over the pile of paperclips and paper
- Move the electromagnet away and turn off the battery to allow the paperclips to drop.
- Repeat until all the iron has been removed leaving a pile of copper.
