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Questions and Answers
What must happen for conduction to take place in a material?
What must happen for conduction to take place in a material?
- The valence and conduction bands must overlap
- Electrons must move from the conduction band to the valence band
- Electrons must be given sufficient energy to jump from the valence band to the conduction band (correct)
- The material must have a large energy gap
What defines electrical conductors in terms of energy bands?
What defines electrical conductors in terms of energy bands?
- They have few free electrons in their valence shell
- They have overlapping valence and conduction bands (correct)
- They have a large energy gap
- They are closely grouped together in a tight crystalline pattern
Why are semiconductors neither good conductors nor good insulators?
Why are semiconductors neither good conductors nor good insulators?
- They have a large energy gap
- They have very few free electrons in their valence shell (correct)
- Their valence and conduction bands overlap
- Their atoms are closely grouped together in a tight crystalline pattern
What type of signal is denoted by a sine wave?
What type of signal is denoted by a sine wave?
Which type of signal transmission is best suited for computing and digital electronics?
Which type of signal transmission is best suited for computing and digital electronics?
What is the main advantage of digital signal processing over analogue signal processing?
What is the main advantage of digital signal processing over analogue signal processing?
What does the width of the forbidden energy gap indicate?
What does the width of the forbidden energy gap indicate?
Which group of materials offers a very low level of conductivity under pressure from an applied voltage source?
Which group of materials offers a very low level of conductivity under pressure from an applied voltage source?
What type of materials usually have both metal and non-metal properties and are usually semiconductors?
What type of materials usually have both metal and non-metal properties and are usually semiconductors?
Which material will support a generous flow of charge when a voltage source of limited magnitude is applied across its terminals?
Which material will support a generous flow of charge when a voltage source of limited magnitude is applied across its terminals?
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