*Question E7D14:
What is the purpose of connecting equal-value resistors across power supply filter capacitors connected in series?*  

*Correct Answer is  D: All these choices are correct*  

### AI Response: (may contain errors)  

Connecting equal-value resistors across power supply filter capacitors in series serves multiple purposes, which is why the correct answer is "All these choices are correct."

### Explanation of the Correct Answer (D: All these choices are correct)

1. **Equalize the voltage across each capacitor**:  
   - When capacitors are connected in series, the voltage across each capacitor can vary due to differences in capacitance or leakage. By placing equal-value resistors across each capacitor, the resistors help to equalize the voltage drop across each capacitor, ensuring that they share the total voltage more evenly. This prevents one capacitor from being over-volted, which can lead to failure.

2. **Discharge the capacitors when voltage is removed**:  
   - The resistors provide a path for the stored charge to dissipate when the power supply is turned off. This is important for safety, as it helps to prevent electric shock from charged capacitors and ensures that the circuit can be safely worked on.

3. **Provide a minimum load on the supply**:  
   - In some power supply designs, especially those using linear regulators, a minimum load is necessary for stable operation. The resistors across the capacitors can act as a load, ensuring that the power supply operates within its specified range, which can improve performance and reliability.

### Why the Other Choices Are Incorrect

- **A: Equalize the voltage across each capacitor**:  
   - This statement is true, but it only addresses one of the functions of the resistors. It does not encompass the full range of benefits provided by the resistors.

- **B: Discharge the capacitors when voltage is removed**:  
   - This statement is also true, but like option A, it only covers one aspect of the resistors' purpose.

- **C: Provide a minimum load on the supply**:  
   - This statement is true as well, but it does not include the other important functions of the resistors.

### Summary

Since all three individual statements (A, B, and C) are correct and represent different aspects of the same concept, the best answer is D: "All these choices are correct." 

### Useful Rule of Thumb

- When using capacitors in series, always consider adding equal-value resistors across each capacitor to ensure voltage sharing, safe discharge, and stable operation of the power supply.