*Question T6B12:
What are the names of the electrodes of a bipolar junction transistor?*  

*Correct Answer is  B: Emitter, base, collector*  

### AI Response: (may contain errors)  

A bipolar junction transistor (BJT) has three main components known as electrodes. The correct answer is:

**B: Emitter, base, collector**

### Explanation of the Correct Answer:
- **Emitter**: This is the region that emits charge carriers (electrons or holes) into the base.
- **Base**: This is the thin region that controls the flow of charge carriers between the emitter and collector. It is lightly doped compared to the emitter and collector.
- **Collector**: This region collects the charge carriers from the base and allows them to flow to the output circuit.

These three components work together to amplify or switch electronic signals.

### Why the Other Choices are Incorrect:
- **A: Signal, bias, power**: These terms do not refer to the physical components of a BJT. "Signal" refers to the input or output of the circuit, "bias" refers to the voltage applied to the transistor, and "power" is a general term for energy.
  
- **C: Input, output, supply**: These terms describe the roles in a circuit but do not correspond to the actual electrodes of a BJT. "Input" and "output" refer to the signal paths, while "supply" refers to the power source.

- **D: Pole one, pole two, output**: This terminology is not used in the context of BJTs. "Pole" is more commonly associated with other types of devices, such as relays or switches.

### Useful Rules of Thumb:
- Remember the order of the electrodes: **Emitter** (E), **Base** (B), **Collector** (C). A common mnemonic is "Every Boy Can" to help recall the names.
- The BJT operates in three regions: active, cutoff, and saturation, which are influenced by the biasing of these electrodes.

Understanding these components and their functions is crucial for working with BJTs in various electronic applications.