Vocabulary
Flow of electric charge. Also known as flow of electrons.
what is electric current?
a temporary magnet created by coiling a wire around a metal core, and passing a current through the wire.
What is an electromagnet?
exists around a magnet or any moving charged object.
What is a magnetic field?
this happens when two magnets with same poles are put close together
What is repel?
Another name for a solenoid
What is a coil?
this allows magnets to interact without touching.
what are electric and magnetic fields?
a device that changes electrical energy into mechanical energy (physical movement)
What are electric motors?
this happens when two magnets of different poles are put close together
what is attract?
Power from an electric source, like a battery, that makes electrons move (current to flow) from the positive end to the negative end.
What is voltage?
a coil of wire that produces a magnetic field when carrying an electric current
What is a solenoid?
This strengthens the solenoid's magnetic field (NOT adding more wire)
increasing the electric current in the wire
Two popular electric generators of renewable energy
what are wind power and hydropower?
what all magnets have
What is a North and South pole?
A piece of iron (or an ore, alloy, or other material) that has its component atoms so ordered that the material exhibits properties of magnetism
What is a magnet?
add more coils (solenoids), increase the voltage, and change the type of core
What are the 3 ways to strengthen an electromagnet?
An electrically charged object sets up a force field around it
What is an electric field?
hair dryers, vacuum cleaners, gaming systems all have this
What are electric motors?
the force of attraction between magnets and magnetic objects.
What is magnetism?
the metal the solenoid is wrapped around
What is the core?
metal detectors, speakers, TV's, mag-lev train
What uses electromagnets?
lines go from north to south, never intersect, and the magnetic fields are stronger the closer to the lines.
What are characteristics of magnetic fields?
Electric Motors run off of electricity and generators produce electricity
What is the relationship between electric motors and generators?
Earth is like this
What is a giant magnet?