What is the purpose of adding an inductor to a Pi-network to create a Pi-L-network?
The correct answer is A: Greater harmonic suppression. What is the purpose of adding an inductor to a Pi-network to create a Pi-L-network is greater harmonic suppression. The additional inductor improves harmonic filtering. For amateur radio operators, this is important for filter design. Understanding this helps when designing matching networks.
Exam Tip
Pi-L-network purpose = greater harmonic suppression. Think 'P'i-'L' = 'P'rovides 'L'ess harmonics (greater suppression). The additional inductor improves harmonic filtering. Not higher efficiency, not eliminate capacitor, not transformation range - just greater harmonic suppression.
Memory Aid
"Pi-L-network purpose = greater harmonic suppression. Think 'P'i-'L' = 'H'armonic suppression. The additional inductor improves harmonic filtering. Important for filter design."
Real-World Application
Adding an inductor to a Pi-network to create a Pi-L-network: The purpose is greater harmonic suppression. The additional inductor provides better filtering of harmonics. This is the purpose - greater harmonic suppression.
Key Concepts
Why Other Options Are Wrong
Option B (Higher efficiency): Incorrect. Higher efficiency isn't the purpose - Pi-L provides greater harmonic suppression. Higher efficiency isn't the purpose.
Option C (To eliminate one capacitor): Incorrect. Eliminating one capacitor isn't the purpose - Pi-L adds an inductor for harmonic suppression. Eliminating capacitor isn't the purpose.
Option D (Greater transformation range): Incorrect. Greater transformation range isn't the purpose - Pi-L provides greater harmonic suppression. Transformation range isn't the purpose.
题目解析
The correct answer is A: Greater harmonic suppression. What is the purpose of adding an inductor to a Pi-network to create a Pi-L-network is greater harmonic suppression. The additional inductor improves harmonic filtering. For amateur radio operators, this is important for filter design. Understanding this helps when designing matching networks.
考试技巧
Pi-L-network purpose = greater harmonic suppression. Think 'P'i-'L' = 'P'rovides 'L'ess harmonics (greater suppression). The additional inductor improves harmonic filtering. Not higher efficiency, not eliminate capacitor, not transformation range - just greater harmonic suppression.
记忆口诀
Pi-L-network purpose = greater harmonic suppression. Think 'P'i-'L' = 'H'armonic suppression. The additional inductor improves harmonic filtering. Important for filter design.
实际应用示例
Adding an inductor to a Pi-network to create a Pi-L-network: The purpose is greater harmonic suppression. The additional inductor provides better filtering of harmonics. This is the purpose - greater harmonic suppression.
错误选项分析
Option B (Higher efficiency): Incorrect. Higher efficiency isn't the purpose - Pi-L provides greater harmonic suppression. Higher efficiency isn't the purpose. Option C (To eliminate one capacitor): Incorrect. Eliminating one capacitor isn't the purpose - Pi-L adds an inductor for harmonic suppression. Eliminating capacitor isn't the purpose. Option D (Greater transformation range): Incorrect. Greater transformation range isn't the purpose - Pi-L provides greater harmonic suppression. Transformation range isn't the purpose.
知识点
Purpose, Adding inductor, Pi-network, Create Pi-L-network, Greater harmonic suppression
Verified Content
Question from official FCC Extra Class question pool. Explanation reviewed by licensed amateur radio operators.