*Question G4B09:
When is an analog multimeter preferred to a digital multimeter?*  

*Correct Answer is  D: When adjusting circuits for maximum or minimum values*  

### AI Response: (may contain errors)  

When adjusting circuits for maximum or minimum values, an analog multimeter is often preferred due to its ability to provide a real-time visual representation of changes. 

### Explanation of the Correct Answer:
- **D: When adjusting circuits for maximum or minimum values**  
  Analog multimeters have a needle that moves smoothly across a scale, allowing you to see trends and changes in voltage or current more easily. This is particularly useful when fine-tuning a circuit, as you can observe the needle's movement and make adjustments accordingly. The continuous display helps in identifying the point of maximum or minimum values more intuitively than a digital readout.

### Explanation of Incorrect Choices:
- **A: When testing logic circuits**  
  Logic circuits often operate at high speeds and require precise measurements that digital multimeters can provide. Digital multimeters can also display logic levels (high or low) more clearly than an analog meter.

- **B: When high precision is desired**  
  Digital multimeters typically offer higher precision and accuracy than analog multimeters. They can display measurements to several decimal places, which is essential for applications requiring high precision.

- **C: When measuring the frequency of an oscillator**  
  Digital multimeters often have built-in frequency measurement capabilities, making them more suitable for measuring the frequency of oscillators. Analog multimeters do not typically measure frequency directly.

### Summary:
- **Analog Multimeter**: Best for real-time adjustments and observing trends.
- **Digital Multimeter**: Better for precision, logic testing, and frequency measurements.

In summary, while both types of multimeters have their uses, the analog multimeter's continuous display makes it particularly useful for adjusting circuits to find maximum or minimum values.