Magnetism I
When two magnets push away from one another; happens when two north or two south poles meet.
What is repelling?
When two magnets draw toward one another; happens when a north and south pole meet.
What is attraction?
A buildup of electric charge on an object or surface.
The loop (path) along which an electric current travels.
What is an electric circuit?
A temporary magnet that works only when electricity runs through it.
What is an electromagnet?
An invisible area where magnetic forces are present.
What is a magnetic field?
A place on a magnet where its pulling force is the strongest.
What is a magnetic pole?
An electric circuit with no breaks.
What is a closed circuit?
An electric circuit with a break in it.
What is an open circuit?
A machine that uses a magnet to change mechanical energy into electrical energy.
What is a generator?
This happens to the magnetic force as the distance between two magnets increases.
What is decreases?
A circuit is closed and a current begins to flow through the wires. What else happens?
What is a magnetic field is generated?
Materials that allow electric current to flow through easily.
What are conductors?
The sudden jump of a spark between two objects.
What is a static discharge?
A wheel shaped like a fan that spins when acted on by a force.
What is a turbine?
Two metals that are attracted to magnets.
What are iron and nickel?
Name 2 materials that are used as semiconductors.
What are silicon and germanium?
Finish this sentence: An electric current will always follow...
What is the path of least resistance?
Materials that do not carry electric current easily.
What are insulators?
A machine that uses an electromagnet to change electrical energy into mechanical energy.
What is an electric motor?
A natural phenomenon that is the result of particles from the Sun interacting with Earth's magnetic field.
What are the Northern Lights (Aurora Borealis)?
The largest natural permanent magnet
What is the Earth?
What happens to current when voltage is decreased?
What is decrease?
A current can be generated in a wire using a magnet. The magnet has to be close to the wire, AND it has to be...
What is in motion/spinning?
Would the speed of a motor be affected if you added another battery to the circuit, if all other factors remain constant? Explain why.
What is yes? Explanation: Increased voltage = increased current = increased magnetic force in the motor