Magnets
The three minerals that are attracted to magnets.
What are iron, cobalt, and nickel?
The particles that have a negative charge.
What are electrons?
The net movement of electric charges in a single direction through a wire or conductor.
What is electric current?
A closed path that electric current follows.
What is a circuit?
A temporary magnet made by wrapping a wire coil carrying a current around an iron core.
What is an electromagnet?
Exerts a force on other magnets and objects made of magnetic materials.
What is a magnetic field?
The accumulation of excess electrical charges on an object.
What is static electricity?
The tendency for a material to oppose the flow of electrons.
What is resistance?
Contains two or more branches for current to flow through.
What is a parallel circuit?
The three materials that are needed to make an electromagnet.
What is a battery, a wire, and a nail?
This happens when two like poles are brought near each other.
What is repel?
Materials in which electrons move easily.
What are conductors?
A battery that contains two connected plates made of different metals in a conductive solution.
What is a wet-cell battery?
A device that keeps a circuit from overheating from too much electric current.
What is a circuit breaker?
A device that changes electrical energy into mechanical energy.
What is an electric motor?
Where the magnetic force is the strongest.
What is at the poles?
States that electric charges can be transferred from one object to another but cannot be created or destroyed.
What is the Law of Conservation of Charge?
All materials have some electrical resistance measured in this unit.
What are Ohms?
A circuit composed of both series and parallel circuits.
What is a complex circuit?
Current that flows in only one direction through a wire.
What is direct current?
A group of atoms with aligned magnetic poles.
What are magnetic domains?
The two ways objects can be charged.
What are charging by contact and charging by conduction?
The force that causes electric charges to flow.
What is voltage difference?
A small piece of metal that melts if the current becomes too high, which opens the circuit.
What is an electric fuse?
The strength of the magnetic field depends on this.
What is the amount of current flowing in the wire?