Deep Dive: G7A02
The correct answer is C: Capacitors and inductors. Components used in a power supply filter network are capacitors and inductors. Filter networks use capacitors and inductors to smooth the rectified DC output. For amateur radio operators, this is how power supplies reduce ripple. Understanding this helps when designing power supplies.
Why Other Answers Are Wrong
Option A (Diodes): Incorrect. Diodes are used in rectifiers, not filter networks. Diodes convert AC to DC, filters smooth the DC. Option B (Transformers and transducers): Incorrect. Transformers are for voltage conversion, not filtering. Transducers convert energy forms, not used in filters. Option D: Incorrect. Since A and B are not correct, 'all of the above' cannot be correct. Only capacitors and inductors are used in filter networks.
Exam Tip
Power supply filter = capacitors and inductors. Think 'F'ilter = 'F'ilters use 'C'apacitors and 'I'nductors. Filter networks use capacitors and inductors to smooth rectified DC output. Not diodes (rectifiers), not transformers/transducers - just capacitors and inductors.
Memory Aid
Power supply filter = capacitors and inductors. Think 'F'ilter = 'F'ilters use 'C'apacitors and 'I'nductors. Filter networks use capacitors and inductors to smooth rectified DC output. Standard power supply filter components.
Real-World Example
A power supply filter network: After rectification, capacitors and inductors smooth the DC output, reducing ripple. Capacitors store energy, inductors filter current. Together they create a low-pass filter that removes AC ripple from the DC output. This is how power supply filters work.
Source & Coverage
Question Pool: 2023-2027 Question Pool
Subelement: G7A
Reference: 2023-2027 Question Pool · G7 - Practical Circuits
Key Concepts
Verified Content
Question from the official FCC General Class pool. Explanation reviewed by licensed amateur radio operators and mapped to the G7A topic.