Deep Dive: E7D14
The correct answer is D: All these choices are correct. What is the purpose of connecting equal-value resistors across power supply filter capacitors connected in series includes: equalize the voltage across each capacitor, discharge the capacitors when voltage is removed, and provide a minimum load on the supply. All three are purposes. For amateur radio operators, this is important for power supply design. Understanding this helps when using series capacitors.
Why Other Answers Are Wrong
Option A: While correct, this is incomplete. Discharging and minimum load are also purposes. Option B: While correct, this is incomplete. Equalizing voltage and minimum load are also purposes. Option C: While correct, this is incomplete. Equalizing voltage and discharging are also purposes.
Exam Tip
All three are purposes of equal-value resistors across series capacitors: equalize voltage, discharge capacitors, provide minimum load. When all listed purposes are valid, 'all of the above' is usually the answer. All are valid purposes.
Memory Aid
All three are purposes of equal-value resistors across series capacitors: Equalize voltage, Discharge capacitors, Provide minimum load. Think 'A'll 'R'esistor purposes. All three are valid purposes. Important for power supply design.
Real-World Example
Equal-value resistors across power supply filter capacitors connected in series: They serve to equalize the voltage across each capacitor, discharge the capacitors when voltage is removed, and provide a minimum load on the supply. All three are purposes. This is the purpose - all of these functions.
Source & Coverage
Question Pool: 2024-2028 Question Pool
Subelement: E7D
Reference: 2024-2028 Question Pool · E7 - Practical Circuits
Key Concepts
Verified Content
Question from the official FCC Extra Class pool. Explanation reviewed by licensed amateur radio operators and mapped to the E7D topic.