Which of the following components should be added to an inductor to increase the inductance?
The correct answer is D: An inductor in series. The component that should be added to an inductor to increase the inductance is an inductor in series. Series inductors add directly, increasing total inductance. For amateur radio operators, this is a basic series inductance principle. Understanding this helps when designing circuits.
Exam Tip
Increase inductance = add inductor in series. Think 'I'ncrease 'I'nductance = 'I'n series 'I'nductors add. Series inductors add directly, increasing total inductance. Not capacitor, not parallel inductor - just series inductor.
Memory Aid
"Increase inductance = add inductor in series. Think 'I'ncrease 'I'nductance = 'I'n series. Series inductors add directly, increasing total inductance. Standard way to increase inductance."
Real-World Application
You have a 10 mH inductor and want more inductance. You add a 20 mH inductor in series. Total inductance = 10 + 20 = 30 mH. Series inductors add directly, increasing total inductance. This is how you increase inductance.
Key Concepts
Why Other Options Are Wrong
Option A: Incorrect. A capacitor in series doesn't increase inductance - capacitors affect capacitance, not inductance. Series capacitor doesn't help.
Option B: Incorrect. A capacitor in parallel doesn't increase inductance - capacitors affect capacitance, not inductance. Parallel capacitor doesn't help.
Option C: Incorrect. An inductor in parallel decreases total inductance - parallel inductors use reciprocal formula, reducing inductance. Parallel inductor doesn't increase inductance.
题目解析
The correct answer is D: An inductor in series. The component that should be added to an inductor to increase the inductance is an inductor in series. Series inductors add directly, increasing total inductance. For amateur radio operators, this is a basic series inductance principle. Understanding this helps when designing circuits.
考试技巧
Increase inductance = add inductor in series. Think 'I'ncrease 'I'nductance = 'I'n series 'I'nductors add. Series inductors add directly, increasing total inductance. Not capacitor, not parallel inductor - just series inductor.
记忆口诀
Increase inductance = add inductor in series. Think 'I'ncrease 'I'nductance = 'I'n series. Series inductors add directly, increasing total inductance. Standard way to increase inductance.
实际应用示例
You have a 10 mH inductor and want more inductance. You add a 20 mH inductor in series. Total inductance = 10 + 20 = 30 mH. Series inductors add directly, increasing total inductance. This is how you increase inductance.
错误选项分析
Option A: Incorrect. A capacitor in series doesn't increase inductance - capacitors affect capacitance, not inductance. Series capacitor doesn't help. Option B: Incorrect. A capacitor in parallel doesn't increase inductance - capacitors affect capacitance, not inductance. Parallel capacitor doesn't help. Option C: Incorrect. An inductor in parallel decreases total inductance - parallel inductors use reciprocal formula, reducing inductance. Parallel inductor doesn't increase inductance.
知识点
Inductance increase, Series inductor, Inductance addition, Series circuit
Verified Content
Question from official FCC General Class question pool. Explanation reviewed by licensed amateur radio operators.