*Question T6D10:
What is the function of component 2 in figure T-1?*  

*Correct Answer is  C: Control the flow of current*  

### AI Response: (may contain errors)  

The correct answer to the question about the function of component 2 in figure T-1 is:

**C: Control the flow of current.**

### Explanation of the Correct Answer:
- **Control the flow of current**: This is typically the function of a component like a transistor or a switch. These components are designed to regulate or control the amount of current that can pass through a circuit, making them essential in various electronic applications.

### Why the Other Choices are Incorrect:
- **A: Give off light when current flows through it**: This describes a light-emitting diode (LED) or a similar light source. If component 2 is not specifically a light-emitting device, this choice is not applicable.
  
- **B: Supply electrical energy**: This function is characteristic of power sources like batteries or power supplies. Component 2 is likely not a source of energy but rather a control element in the circuit.

- **D: Convert electrical energy into radio waves**: This describes the function of an antenna or a transmitter. If component 2 is not designed for transmission, this choice is incorrect.

### Useful Concepts:
- **Transistors**: Often used to control current flow in circuits. They can act as switches or amplifiers.
- **Switches**: Simple devices that can open or close a circuit, controlling the flow of current.

Understanding the role of different components in a circuit is crucial for the Extra Class exam, as it helps in troubleshooting and designing radio systems.