*Question T6A08:
What is the function of an SPDT switch?*  

*Correct Answer is  C: A single circuit is switched between one of two other circuits*  

### AI Response: (may contain errors)  

An SPDT (Single Pole Double Throw) switch is a type of switch that allows you to control a single circuit by connecting it to one of two different outputs. 

### Correct Answer Explanation:
- **Correct Answer: C: A single circuit is switched between one of two other circuits.**
  - An SPDT switch has one input (the pole) and two outputs (the throws). It can connect the input to either of the two outputs, effectively allowing you to switch a single circuit between two different paths.

### Incorrect Choices Explanation:
- **A: A single circuit is opened or closed.**
  - This describes a SPST (Single Pole Single Throw) switch, which simply connects or disconnects a single circuit without the option to switch between two outputs.

- **B: Two circuits are opened or closed.**
  - This is not accurate for an SPDT switch. An SPDT switch does not control two separate circuits; it only switches one circuit between two options.

- **D: Two circuits are each switched between one of two other circuits.**
  - This describes a more complex switch configuration, such as a DPDT (Double Pole Double Throw) switch, which can control two separate circuits simultaneously.

### Summary:
- An SPDT switch is specifically designed to switch one circuit between two different paths, making it versatile for various applications in radio and electronics. 

### Useful Rule of Thumb:
- Remember that "Single Pole" refers to one circuit being controlled, and "Double Throw" indicates that it can connect to two different outputs. This is key to understanding the functionality of SPDT switches.