*Question G7A10:
Which symbol in figure G7-1 represents a Zener diode?*  

*Correct Answer is  D: Symbol 5*  

### AI Response: (may contain errors)  

In figure G7-1, the symbols represent various electronic components. To identify the Zener diode, it's important to recognize its unique symbol characteristics.

1. **Correct Answer: Symbol 5**  
   - The Zener diode symbol is similar to a regular diode but with bent edges on the bar side, resembling a "Z" shape. This indicates its ability to allow current to flow in the reverse direction when a specific breakdown voltage is reached, which is a key feature of Zener diodes.

2. **Why the Other Choices are Incorrect:**
   - **Symbol 4**: This is typically the symbol for a regular diode, which has a simple triangle pointing to a line. It does not have the bent edges characteristic of a Zener diode.
   - **Symbol 1**: This symbol often represents a resistor, which is a zigzag line or a rectangle, depending on the standard used. It does not resemble a diode at all.
   - **Symbol 11**: This could represent a different component, such as a capacitor or an inductor, depending on the specific figure. It does not have the diode shape.

3. **Useful Information:**
   - **Zener Diode Function**: Zener diodes are used for voltage regulation. They maintain a constant output voltage despite changes in the load current or input voltage, as long as the input voltage is above the Zener breakdown voltage.
   - **Symbol Recognition**: Familiarity with electronic symbols is crucial for identifying components in circuit diagrams. The Zener diode's distinctive "Z" shape on the cathode side is a key identifier.

By understanding these symbol characteristics, you can accurately identify the Zener diode in circuit diagrams.