Ch. 7 Electromagnetism

These flashcards cover key vocabulary and concepts from the lecture on Electromagnetism.

Magnetism

The ability of a Iodestone or magnetic material to attract iron, nickel, and cobalt.

Magnetic Poles

Regions of magnetism that always exist as a dipole.

Ferromagnetic Materials

Materials that are strongly attracted to magnets or a magnetic field.

Paramagnetic Materials

Materials that are slightly attracted to magnets.

Diamagnetic Materials

Materials that are weakly repelled by a magnet.

Nonmagnetic Materials

Materials that do not react in a magnetic field.

Magnetic Induction

The alignment of dipoles in a non-magnetized iron bar brought into an external magnetic field.

Magnetic Domain

A group of atoms aligned in the same direction that exhibit a magnetic field.

Gauss (G) and Tesla (T)

Units of measurement for magnetic field strength; 1 tesla = 10,000 gauss.

Repulsion-Attraction Principle

Like poles repel each other, while opposite poles attract.

Electromagnet

A device consisting of an iron core in the center of a solenoid.

Electromagnetic Induction

The production of a current in a conductor by a changing magnetic field.

Self-Induction

Induction produced in a single coil when alternating current creates a changing magnetic field.

Generator

An electromagnetic device that converts mechanical energy to electrical energy.

Motor

An electromagnetic device that converts electrical energy into mechanical energy.