Physics and Electrical Charges Quiz

What is the main focus of Unit 2 in the provided learning material?

• The physics of matter

• The differences between conductors, semiconductors, and insulators

• The structure of the atom

• The properties of gold-plated contacts

According to the Law of Electrical Charges, what keeps electrons from breaking out of their orbit?

• Centrifugal force

• The attraction between the positive charge of the protons and the negative charge of the electrons

• The speed of the electrons

• The size of the nucleus

What is the maximum number of electrons that can be in the valence shell?

• Six

• Seven

• Eight

• Nine

What happens to an electron when sufficient energy is applied to break it out of the valence shell?

• It moves toward a positive charge

• It moves away from a negative charge

• It is no longer bound to the atom

• All of the above

Why is copper a better conductor than aluminum?

• Copper has more valence electrons

• Copper's single valence electron receives all of the energy

• Aluminum's valence electrons are more stable

• Copper is heavier than aluminum

What makes insulator atoms very difficult to free?

• They have more than eight valence electrons

• Their valence shell is completely filled with eight electrons

• They have fewer than six valence electrons

• They have unstable valence electrons

How many valence electrons do semiconductor atoms typically contain?

• Two or three

• Four or five

• Six or seven

• Eight or nine

What can semiconducting materials used in electronic components act like?

• Only conductors

• Only insulators

• Both conductors and insulators

• Neither conductors nor insulators

In which electronic components are semiconducting materials commonly used?

• Resistors and capacitors

• Diodes and transistors

• Inductors and transformers

• Batteries and switches

What determines whether semiconducting materials act like conductors or insulators?

• The temperature

• The type of material

• Precisely controlled circumstances

• The size of the component