What is the magnitude of the circulating current within the components of a parallel LC circuit at resonance?
The correct answer is B: It is at a maximum. What is the magnitude of the circulating current within the components of a parallel LC circuit at resonance is that it is at a maximum. At parallel resonance, circulating current is maximum. For amateur radio operators, this is important for circuit theory. Understanding this helps when working with resonant circuits.
Exam Tip
Parallel LC circulating current at resonance = at a maximum. Think 'P'arallel 'L'C at 'R'esonance = 'M'aximum 'C'irculating current. At parallel resonance, circulating current is maximum. Not minimum, not formulas - just maximum.
Memory Aid
"Parallel LC circulating current at resonance = at a maximum. Think 'P'arallel 'L'C = 'M'aximum current. At parallel resonance, circulating current is maximum. Important for circuit theory."
Real-World Application
A parallel LC circuit at resonance: The magnitude of the circulating current within the components (between L and C) is at a maximum. This is because at resonance, the LC tank has maximum energy storage and circulation. This is the magnitude - at a maximum.
Key Concepts
Why Other Options Are Wrong
Option A: Incorrect. It is at a minimum isn't correct - at parallel resonance, circulating current is maximum. Minimum is wrong.
Option C: Incorrect. It equals 1/(2π√(LC)) isn't the answer - circulating current is at maximum. Formula isn't the answer.
Option D: Incorrect. It equals 2π√(LC) isn't the answer - circulating current is at maximum. Formula isn't the answer.
题目解析
The correct answer is B: It is at a maximum. What is the magnitude of the circulating current within the components of a parallel LC circuit at resonance is that it is at a maximum. At parallel resonance, circulating current is maximum. For amateur radio operators, this is important for circuit theory. Understanding this helps when working with resonant circuits.
考试技巧
Parallel LC circulating current at resonance = at a maximum. Think 'P'arallel 'L'C at 'R'esonance = 'M'aximum 'C'irculating current. At parallel resonance, circulating current is maximum. Not minimum, not formulas - just maximum.
记忆口诀
Parallel LC circulating current at resonance = at a maximum. Think 'P'arallel 'L'C = 'M'aximum current. At parallel resonance, circulating current is maximum. Important for circuit theory.
实际应用示例
A parallel LC circuit at resonance: The magnitude of the circulating current within the components (between L and C) is at a maximum. This is because at resonance, the LC tank has maximum energy storage and circulation. This is the magnitude - at a maximum.
错误选项分析
Option A: Incorrect. It is at a minimum isn't correct - at parallel resonance, circulating current is maximum. Minimum is wrong. Option C: Incorrect. It equals 1/(2π√(LC)) isn't the answer - circulating current is at maximum. Formula isn't the answer. Option D: Incorrect. It equals 2π√(LC) isn't the answer - circulating current is at maximum. Formula isn't the answer.
知识点
Circulating current, Parallel LC circuit, At resonance, At a maximum
Verified Content
Question from official FCC Extra Class question pool. Explanation reviewed by licensed amateur radio operators.