Magnetism and Electromagnetism Review

any material that attracts iron and materials that contain iron

magnet

the force of attraction or repulsion of magnetic materials

magnetism

The magnetic force is strongest where on a magnet?

poles

The attraction and repulsion between magnetic poles is known as the magnetic ____________.

force

the region around a magnet where the force is exerted

magnetic field

lines that map out the magnetic field around the magnet

magnetic field lines

the relationship between electricity and magnetism; magnetism produced by a electric current

electromagnetism

a coil of wire with a current

solenoid

a magnet created by wrapping a coil of wire with a current running through it around a core of material that is easily magnetized

electromagnet

a device that transforms electrical energy to mechanical energy

electric motor

the process of generating an electric current from the motion of a conductor through a magnetic field

electromagnetic induction

current consisting of charges that flow in one direction in a circuit

direct current (DC)

current consisting of charges that move back and forth in a circuit

alternating current (AC)

a device that transforms mechanical energy into electrical energy

electric generator

Name some magnetic materials.

iron, cobalt, nickel

What are strong parts of the magnet called?

poles

What are permanent magnets made from?

steel

What is iron?

a ferromagnetic material

Is iron suitable for a permanent magnet?

no

What kind of magnets are magnetically soft material used for?

temporary magnets

What are the names of the lines we draw to show magnetic field lines?

lines of flux

What happens when a current flows through a wire?

it creates a magnetic field

List three ways the strength of the magnetic field around a solenoid can be increased.

stacking the wire loops on top of each other, wrapping the coil wire around ferromagnetic material, and increasing the current

An electric potential applied to a conductor produces:

both electric current and magnetic field

What is the SI unit of magnetic field strength?

tesla (T)

The force between magnetic poles is proportional to the ______#1______ of the magnetic pole strength divided by the ______#2______ of the distance between them.

#1: product

#2: square

What type of magnetism is plastic?

diamagnetic

The magnetic intensity is greatly increased by the addition of what to the core?

iron

How did Oersted discover magnetism?

by observing that when a current passed through a wire, the compass needle swung to the wire

When a group of dipoles are aligned, they create?

magnetic domain

In the United States alternating current goes through a complete cycle every __________ second.

1/60

The magnitude of an induced current depends on the:

strength of the magnetic field, velocity of the magnetic field as it moves past the conductor, angle of the conductor in the magnetic field, and number of turns in the conductor

A device that converts any form of energy into electrical energy is a source:

generator

The two basic types of induction are ______#1_______ induction and ______#2_______ induction.

#1: mutual

#2: self