What is the effect on the magnitude of pure reactance when it is converted to susceptance?
The correct answer is D: It is replaced by its reciprocal. What is the effect on the magnitude of pure reactance when it is converted to susceptance is that it is replaced by its reciprocal. Susceptance B = 1/X, so the magnitude becomes the reciprocal. For amateur radio operators, this is important for circuit theory. Understanding this helps when converting between reactance and susceptance.
Exam Tip
Pure reactance to susceptance = magnitude replaced by its reciprocal. Think 'R'eactance to 'S'usceptance = 'R'eciprocal. Susceptance B = 1/X, so magnitude becomes reciprocal. Not unchanged, not sign reversed, not 90° shift - just replaced by reciprocal.
Memory Aid
"Pure reactance to susceptance = magnitude replaced by its reciprocal. Think 'R'eactance to 'S'usceptance = 'R'eciprocal. Susceptance B = 1/X, so magnitude becomes reciprocal. Important for circuit theory."
Real-World Application
Converting pure reactance to susceptance: The effect on the magnitude is that it is replaced by its reciprocal. For example, if X = 100 ohms, then B = 1/100 = 0.01 siemens. The magnitude becomes the reciprocal. This is the effect - replaced by its reciprocal.
Key Concepts
Why Other Options Are Wrong
Option A: Incorrect. It is unchanged isn't correct - reactance magnitude is replaced by its reciprocal. Unchanged is wrong.
Option B: Incorrect. The sign is reversed isn't the effect - the magnitude is replaced by its reciprocal. Sign reversal isn't the effect.
Option C: Incorrect. It is shifted by 90 degrees isn't the effect - the magnitude is replaced by its reciprocal. 90° shift isn't the effect.
题目解析
The correct answer is D: It is replaced by its reciprocal. What is the effect on the magnitude of pure reactance when it is converted to susceptance is that it is replaced by its reciprocal. Susceptance B = 1/X, so the magnitude becomes the reciprocal. For amateur radio operators, this is important for circuit theory. Understanding this helps when converting between reactance and susceptance.
考试技巧
Pure reactance to susceptance = magnitude replaced by its reciprocal. Think 'R'eactance to 'S'usceptance = 'R'eciprocal. Susceptance B = 1/X, so magnitude becomes reciprocal. Not unchanged, not sign reversed, not 90° shift - just replaced by reciprocal.
记忆口诀
Pure reactance to susceptance = magnitude replaced by its reciprocal. Think 'R'eactance to 'S'usceptance = 'R'eciprocal. Susceptance B = 1/X, so magnitude becomes reciprocal. Important for circuit theory.
实际应用示例
Converting pure reactance to susceptance: The effect on the magnitude is that it is replaced by its reciprocal. For example, if X = 100 ohms, then B = 1/100 = 0.01 siemens. The magnitude becomes the reciprocal. This is the effect - replaced by its reciprocal.
错误选项分析
Option A: Incorrect. It is unchanged isn't correct - reactance magnitude is replaced by its reciprocal. Unchanged is wrong. Option B: Incorrect. The sign is reversed isn't the effect - the magnitude is replaced by its reciprocal. Sign reversal isn't the effect. Option C: Incorrect. It is shifted by 90 degrees isn't the effect - the magnitude is replaced by its reciprocal. 90° shift isn't the effect.
知识点
Magnitude of pure reactance, Converted to susceptance, Replaced by its reciprocal, Reactance to susceptance
Verified Content
Question from official FCC Extra Class question pool. Explanation reviewed by licensed amateur radio operators.