Chapter 4 & 5

Question 1

Magnets that do not require any power or force to maintain their fields are called?

Answer 1

Permanent magnets

Question 2

The regions of metal molecular structure that share valence electrons in a way that their spin patterns are the same direction and cause their magnetic fields to add are called

Answer 2

Magnetic domains

Question 3

Metals that are easily magnetized. Examples of these materials are iron, nickel, cobalt, and Maganese. 

Answer 3

Ferromagnetic materials

Question 4

Metals that can be magnetized, but not as easily as ferromagnetic materials. Some examples of these materials are platinum, titanium, and chromium. 

Answer 4

Paramagnetic materials

Question 5

Either metal or nonmetal materials that cannot be magnetized. The magnetic lines of force tend to go around them instead of through them. Some examples of these materials are copper brass and antimony.

Answer 5

Diamagnetic materials 

Question 6

These magnets depend on electric current flow to produce a magnetic field ?

Answer 6

Electromagnets 

Question 7

The strength of an electromagnet is proportional to its ________. _________ are determined by multiplying the number of terms of wire by the current flow.

Answer 7

 Ampere-turns 

Question 8

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

Answer 8

Permeability

Question 9

Resistance to magnetism is called ?

Answer 9

Reluctance

Question 10

When a material has reached its maximum magnetic potential, it has reached a point of _____? 

Answer 10

Saturation 

Question 11

Magnetic strength is measured in a term called?

Answer 11

Flux density 

Question 12

A variable resistor used to provide a variable voltage is called a ?

Answer 12

Potentiometer