Chapter 1

Question 1

Direct current is what type of current?

Answer 1

Unidirectional, meaning that it only flows in one direction.

Question 2

Alternating current is what type of current?

Answer 2

Bidirectional, meaning that it reverses direction of flow at regular intervals.

Question 3

What are the three principal parts of an atom and their charges?

Answer 3

protons/positive, neutrons/neutral, electrons/ negative

Question 4

any electrons located on the outer shell of an atom are known as?

Answer 4

Valence electrons

Question 5

a(an) material that permits electrons to flow through them easily and usually have 1 to 3 electrons are called.?

Answer 5

conductors

Question 6

The flow of electrons is?

Answer 6

Electricity or electrical current

Question 7

materials that resist the flow of electricity and contain 7-8 electrons are called?

Answer 7

Insulators

Question 8

materials that are neither good conductors nor insulators and contain 4 electrons are called?

Answer 8

Semiconductors.