Delmar Unit 4

One Gauss equals ___ lines per square inch?

6.451

the strength of an electromagnet is primarily proportion to its?

Amp turns

Angular difference between true North and magnetic north is known as the angle of?

Declination

Metals that can not be magnetized are called?

Diamagnetic

Regions formed in the molecules structure of magnetic metals are sometimes called magnetic ___?

Domains

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

Electromagnet

Magnetism can be explained in terms of ___ spin patterns?

Electron

Metals that are most easily magnetized are called?

Ferromagnetic

Magnetic lines of force are called lines of?

Flux

In the English system of measure, magnetic strength is measure in terms of?

Flux density

The three elements that form natural magnets are?

Iron, nickel, cobalt

If a permanent magnet is cut into pieces, each piece ___ a separate magnet?

Is

To locate the north pole of an electromagnet, use the ___ rule?

Left-hand

Man made permanent magnets retain their magnetism ___ than natural magnets?

Longer

The lodestone is a name for a naturally occurring magnetic material also called?

Magnetite

If an object is placed in the field of a strong electromagnet connected to a DC line, the object will be?

Magnetized

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

Magnetomotive force

Metals that can be magnetized are called?

Paramagnetic

What type of magnets do not require an y power to maintain their magnetic fields?

Permanent magnets

The measure of a materials ability to be magnetized is called?

Permeability

The measure of a materials resistant to magnetism is known as?

Reluctance

The amount of magnetism left in a material after the magnetizing force has been stopped is called?

Residual Magnetism

The north magnetic pole of a compass needle is attracted to the ___ magnetic pole of the earth?

South

When a magnetic material molecules are all lined up and an increase in current flow no longer causes increase in magnetic strength, the material has reached?

Saturation

One Newton is equal to ___ pounds?

0.2248 pounds