Advanced Qualification · A-002 Advanced components and circuits · A-002-003-001
What is the alpha of a bipolar transistor?
- A The change of collector current with respect to gate current
- B The change of collector current with respect to emitter current
- C The change of collector current with respect to base current
- D The change of base current with respect to collector current
Correct answer: B — The change of collector current with respect to emitter current. From the official ISED question bank, verified word for word.
Why
Alpha measures how much the current flowing out of the collector changes when the current entering the emitter changes. The full explanation — and one for every question — is in Pro.
Practise this section
Advanced components and circuits: semiconductors, amplifier classes, oscillators, mixers, filters and digital logic.