Answer: IC/IB (collector current divided by base current).
- A IB/IC, the reciprocal of the actual current gain ratio
- B IC/IB (collector current divided by base current)
- C IE/IC, the ratio of emitter current to collector current
- D VCE/VBE, a ratio of voltages rather than currents
Correct answer: B. IC/IB (collector current divided by base current)
Explanation: Beta = hFE = IC/IB. Common emitter current gain. Typical values: 50-300 for BJTs. Small base current controls large collector current.
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.