Answer: ICn/IE.
- A ICn/IE
- B ICp/IE
- C IE/IC
- D IB/IC
Correct answer: A. ICn/IE
Explanation: Emitter injection efficiency gamma = fraction of emitter current that is due to minority carriers injected into base. gamma = IEn/IE for npn.
Conductors have overlapping bands, semiconductors have a small energy gap that can be bridged by heat or doping, and insulators have a large gap that blocks conduction.
Concept context
Band theory, p-n junction, diodes, transistors, logic gates, and integrated circuits.