*Question T6C02:
What is component 1 in figure T-1?*  

*Correct Answer is  A: Resistor*  

### AI Response: (may contain errors)  

In question T6C02, we need to identify component 1 in figure T-1, which is a resistor.

### Explanation of the Correct Answer:
- **Correct Answer: Resistor**
  - A resistor is a passive electronic component that limits the flow of electric current in a circuit. It is typically represented in circuit diagrams by a zigzag line or a rectangle. Resistors are used for various purposes, such as voltage division, current limiting, and biasing active components.

### Explanation of Incorrect Answers:
- **A: Transistor**
  - A transistor is an active component used for amplification or switching. It usually has three terminals (emitter, base, collector for bipolar transistors) and is not represented as a simple line or rectangle like a resistor.

- **C: Battery**
  - A battery is a source of electrical energy, typically represented by two parallel lines of different lengths (the longer line represents the positive terminal). It provides power to the circuit rather than limiting current.

- **D: Connector**
  - A connector is a component used to join electrical circuits together. It is usually depicted as a pair of circles or lines that indicate where wires can be attached. Connectors do not limit current like resistors do.

### Summary:
- The correct identification of components in circuit diagrams is crucial for understanding how circuits function. Resistors are fundamental components that control current flow, while transistors, batteries, and connectors serve different roles in a circuit. 

### Useful Rule of Thumb:
- When identifying components in a circuit diagram, remember:
  - Resistors limit current.
  - Transistors amplify or switch signals.
  - Batteries provide power.
  - Connectors join circuits. 

This knowledge will help you accurately interpret circuit diagrams in the Extra Class exam.