Magnets
What poles attract on magnets?
Opposite
Our compasses point to our cardinal North. What magnetic pole it is actually pointing to?
South
Name the magnetic field that is created around an electromagnet
Solenoid
Define magnetic attraction
To pull objects toward each other
How can magnets cause objects to have kinetic energy?
A magnetic force can convert potential energy stored in a magnetic field to kinetic energy.
What happens when the same poles of two magnets are brought close together?
They repel
Compasses are made up of what?
A tiny magnet/magnetic material
Name an advantage to electromagnets compared to permanent magnets
- Turn on/off
- Change the charge by reversing the electric current
- Increase magnetism by increasing the electric current
Define electromagnet
A type of magnet where the magnetic field is produced by electric current
What happens to the energy in a system of magnets when the magnetic force causes two magnets to move?
Some potential energy changes into kinetic energy.
What poles repel on magnets?
Like/similar poles
True or False: Earth's magnetic poles are in the same place as the geographic poles.
False (poles are switched)
Name the parts of a simple electromagnet.
- Wire
- Battery
- Metal object (nail/screw/bolt)
Define convert
To change from one type to another
Magnetic field lines are drawn from ______ to _______.
North to South
What is a factor that increases magnetic force?
- Distance between magnets
- Magnet strength
Earth's magnetic field and a bar magnet attract particles to the same locations. Where are they?
The north and south poles.
What is flowing through an electromagnet to give it magnetism?
Electric current
Define force
A push or pull that can change the motion of an object
Which of the following best describes a magnetic field?
The space around a magnet in which magnetic forces can act on objects
What is one way we can see magnetic field lines?
- sprinkle iron filings
True or false: Earth's north and south poles are where Earth's magnetic field is the strongest.
True
How can I increase magnetism in an electromagnet?
- Putting more loops/coils around the metal object
- increasing the voltage of the battery
Define energy
The ability to make things move or change
Magnets store their potential energy in their ________.