Quiz on Solid State Fundamentals

What are the three groups materials can be classified into based on their electrical properties?

• Conductors, Semiconductors, and Insulators

• Conductors, Insulators, and Superconductors

• Conductors, Insulators, and Dielectrics

• Conductors, Metals, and Non-metals

Which of the following is a characteristic of good insulators?

• Valence electrons are tightly bound to the atoms.

• They allow free movement of electrons.

• They are typically single-element materials.

• They have low resistivities.

What is the net charge of a carbon atom?

• +4

• -6

• -4

• +6

Which of the following is NOT a single-element semiconductor?

• Silicon (Si)

• Germanium (Ge)

• Arsenic (As)

• Copper (Cu)

What happens when an electron acquires enough energy in a semiconductor?

• It becomes a free electron.

• It creates a hole.

• It becomes a valence electron.

• It forms a covalent bond.

What is the term for the difference in energy between the valence band and the conduction band?

• Current gap

• Voltage drop

• Band width

• Energy gap

What is an intrinsic crystal?

• A crystal with impurities

• A crystal that is a good insulator

• A crystal with no impurities

• A crystal that conducts electricity

What is created when an electron jumps to the conduction band?

• A hole

• A covalent bond

• A free electron

• An electron-hole pair

Which of the following describes electron current in semiconductors?

• Movement of holes

• Movement of impurities

• Movement of free electrons

• Movement of valence electrons

What is hole current in semiconductors?

• Movement of impurities

• Movement of free electrons

• Movement of conduction electrons

• Movement of valence electrons into holes