Advanced Qualification · A-002 Advanced components and circuits · A-002-003-010
The current gain of a bipolar transistor in common emitter or common collector compared to common base configuration is:
- Ausually about double
- Busually about half
- Chigh to very high
- Dvery low
Correct answer: C — high to very high. From the official ISED question bank, verified word for word.
Why
In a bipolar transistor, the common emitter and common collector setups act like amplifiers that multiply the input current significantly, often by factors of dozens or hundreds, whereas the common base arrangement passes almost the same current it receives. The full explanation — and one for every question — is in Pro.
Practise this section
Advanced components and circuits is section A-002 of the Advanced exam: Advanced components and circuits: semiconductors, amplifier classes, oscillators, mixers, filters and digital logic.
Drill A-002 — free, no account