Aircraft Electricity 1

What force is demonstrated in objects with unlike charges?

attraction

If an object is placed in the field of a strong electromagnet connected to an AC line, the object will be __________.

demagnetized

An insulator is a material containing __________ valence electrons.

five or six, seven or eight. (more than four valence electrons)

The three substances that form natural magnets are .

iron, nickel, and cobalt

Diamagnetic

Cannot be magnetized

What type of magnet depends on flowing current to produce a magnetic field?

Electromagnet

What is the smallest part of an element that still retains the properties of that element?

An atom

Paramagnetic

Can be magnetized, but not as easily

Matter can exist in only two states: solid or liquid.

False (solids, liquids, gases, plasma)

The north pole of a compass needle points in the direction of the south geographic pole.

False (south magnetic pole)

flux (phi)

Magnetic lines of force

What part of an atom has no charge?

Neutron

What part of an atom has a positive charge?

Proton

The measure of a material's resistance is magnetism is known as __________.

Reluctance

Direct current is described as __________.

Unidirectional

The regions formed in the molecular structure of magnetic metals are sometimes called magnetic __________.

domains

Ferromagnetic

easily magnetized

What are the three principle parts of an atom?

electron, neutron, and proton

Electrical current is the flow of __________.

electrons

To locate the north pole of an electromagnet, use the __________ -hand rule.

left

In the English system, the total force producing a magnetic field is the __________.

magnetomotive force

A conductor is made from a material that contains between __________ valence electrons.

one and three (fewer than four valence electrons)

The measure of a material's ability to be magnetized is called __________.

permeability

The north magnetic pole of a compass needle is attracted to the __________ magnetic pole of the earth.

south