Magnets
The two poles of a magnet are the...
North and south pole
Opposite poles.
Attract or repel?
Attract
Paperclips are attracted to a magnet because?
They contain iron.
True or false - all metals are magnetic
False
The pole that a compass needle will naturally find is..
The magnetic north pole
Similar poles.
Attract or repel?
They push each other away, repel.
Name 2 ways that electromagnets are DIFFERENT from bar magnets
-Can be turned off
-Can change poles
-Rely on electricity
-Can be strengthened or weakened
What does a magnetic field look like?
It is invisible
A magnet is only attracted to things that are made of...
Iron, cobalt, and nickel
Magnetism is a ___ ________ force.
Non contact
How can you switch the poles of electromagnets?
Flip the battery
Magnets are not attracted to...(name 3 types of materials)
Paper, glass, rubber, wood
The magnetic field is strongest at the..
The poles.
What is a magnetic field line?
A line that connects opposite magnetic poles and represents the strength and direction of the magnetic field.
The magnetic field generated by a simple wire is stronger or weaker than that of a coiled wire?
It is weaker.
What useful device is affected by the Earth's magnetic field.
A compass.
What happens if you break a magnet in half?
Both halves will form a new pole so that they continue to have north and south poles
What is a coil of wire that acts like a magnet when a flow of electricity passes through it called?
An electromagnet
When additional coils are added to a solenoid the field gets...?
It gets stronger.
How can you use magnetic field lines to determine how strong a magnet is?
The closer together the lines are the stronger the magnet.