Which describes a Pi-L network?
The correct answer is B: A Pi-network with an additional output series inductor. Which describes a Pi-L network is a Pi-network with an additional output series inductor. Pi-L adds an inductor to the Pi-network output. For amateur radio operators, this is important for filter design. Understanding this helps when designing matching networks.
Exam Tip
Pi-L network = Pi-network with additional output series inductor. Think 'P'i-'L' = 'P'i-network + 'L' inductor (additional output series). Pi-L adds an inductor to the Pi-network output. Not Phase Inverter Load, not three parts, not isolated from ground - just Pi-network with additional output series inductor.
Memory Aid
"Pi-L network = Pi-network with additional output series inductor. Think 'P'i-'L' = 'P'i + 'L' inductor. Pi-L adds an inductor to the Pi-network output. Important for filter design."
Real-World Application
A Pi-L network: It's a Pi-network with an additional output series inductor. The Pi-network has capacitors to ground and an inductor in series, and Pi-L adds another inductor in series at the output. This is what it is - Pi-network with additional output series inductor.
Key Concepts
Why Other Options Are Wrong
Option A: Incorrect. Phase Inverter Load network isn't Pi-L - Pi-L is Pi-network with additional output series inductor. Phase Inverter Load isn't Pi-L.
Option C: Incorrect. Network with only three discrete parts isn't Pi-L - Pi-L has more parts. Three parts isn't Pi-L.
Option D: Incorrect. Matching network with all components isolated from ground isn't Pi-L - Pi-L has capacitors to ground. Isolated from ground isn't Pi-L.
题目解析
The correct answer is B: A Pi-network with an additional output series inductor. Which describes a Pi-L network is a Pi-network with an additional output series inductor. Pi-L adds an inductor to the Pi-network output. For amateur radio operators, this is important for filter design. Understanding this helps when designing matching networks.
考试技巧
Pi-L network = Pi-network with additional output series inductor. Think 'P'i-'L' = 'P'i-network + 'L' inductor (additional output series). Pi-L adds an inductor to the Pi-network output. Not Phase Inverter Load, not three parts, not isolated from ground - just Pi-network with additional output series inductor.
记忆口诀
Pi-L network = Pi-network with additional output series inductor. Think 'P'i-'L' = 'P'i + 'L' inductor. Pi-L adds an inductor to the Pi-network output. Important for filter design.
实际应用示例
A Pi-L network: It's a Pi-network with an additional output series inductor. The Pi-network has capacitors to ground and an inductor in series, and Pi-L adds another inductor in series at the output. This is what it is - Pi-network with additional output series inductor.
错误选项分析
Option A: Incorrect. Phase Inverter Load network isn't Pi-L - Pi-L is Pi-network with additional output series inductor. Phase Inverter Load isn't Pi-L. Option C: Incorrect. Network with only three discrete parts isn't Pi-L - Pi-L has more parts. Three parts isn't Pi-L. Option D: Incorrect. Matching network with all components isolated from ground isn't Pi-L - Pi-L has capacitors to ground. Isolated from ground isn't Pi-L.
知识点
Pi-L network, Pi-network, Additional output series inductor
Verified Content
Question from official FCC Extra Class question pool. Explanation reviewed by licensed amateur radio operators.