Electronics-semiconductor Principles
Electronics-semiconductor Principles
11. Which material may also be considered a semiconductor element?
- carbon
- ceramic
- mica
- argon
14. When an electron jumps from the valence shell to the conduction band, it leaves a gap. What is this gap called?
- energy gap
- hole
- electron-hole pair
- recombination
15. Forward bias of a silicon P-N junction will produce a barrier voltage of approximately how many volts?
- 0.2
- 0.3
- 0.7
- 0.8
17. When and who discovered that more than one transistor could be constructed on a single piece of semiconductor material:
- 1949, William Schockley
- 1955, Walter Bratten
- 1959, Robert Noyce
- 1960, John Bardeen
18. When is a P-N junction formed?
- in a depletion region
- in a large reverse biased region
- the point at which two opposite doped materials come together
- whenever there is a forward voltage drop
19. A P-N junction mimics a closed switch when it:
- has a low junction resistance
- is reverse biased
- cannot overcome its barrier voltage
- has a wide depletion region