Deep Dive: E7C03
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.
Why Other Answers 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.
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 Example
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.
Source & Coverage
Question Pool: 2024-2028 Question Pool
Subelement: E7C
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 E7C topic.