Deep Dive: E5A05
The correct answer is A: Matching bandwidth is decreased. What is the result of increasing the Q of an impedance-matching circuit is that matching bandwidth is decreased. Higher Q means narrower bandwidth. For amateur radio operators, this is important for circuit design. Understanding this helps when designing matching circuits.
Why Other Answers Are Wrong
Option B: Incorrect. Matching bandwidth increased isn't correct - higher Q decreases bandwidth. Increased is wrong. Option C: Incorrect. Losses increase isn't the result - higher Q decreases bandwidth. Losses isn't the result. Option D: Incorrect. Harmonics increase isn't the result - higher Q decreases bandwidth. Harmonics isn't the result.
Exam Tip
Increasing Q of matching circuit = matching bandwidth decreased. Think 'I'ncreasing 'Q' = 'N'arrower 'B'andwidth. Higher Q means narrower bandwidth. Not increased, not losses, not harmonics - just decreased bandwidth.
Memory Aid
Increasing Q of matching circuit = matching bandwidth decreased. Think 'I'ncreasing 'Q' = 'N'arrower. Higher Q means narrower bandwidth. Important for circuit design.
Real-World Example
Increasing the Q of an impedance-matching circuit: The result is that matching bandwidth is decreased. Higher Q means the circuit is more selective (narrower bandwidth). This is the result - decreased matching bandwidth.
Source & Coverage
Question Pool: 2024-2028 Question Pool
Subelement: E5A
Reference: 2024-2028 Question Pool · E5 - Electrical Principles
Key Concepts
Verified Content
Question from the official FCC Extra Class pool. Explanation reviewed by licensed amateur radio operators and mapped to the E5A topic.