What happens to reactive power in ideal inductors and capacitors?
The correct answer is B: Energy is stored in magnetic or electric fields, but power is not dissipated. What happens to reactive power in ideal inductors and capacitors is that energy is stored in magnetic or electric fields, but power is not dissipated. Reactive power stores energy but doesn't dissipate it. For amateur radio operators, this is important for power theory. Understanding this helps when calculating power.
Exam Tip
Reactive power in ideal L/C = energy stored in fields, power not dissipated. Think 'R'eactive 'P'ower = 'R'eturns 'P'eriodically (stores, doesn't dissipate). Reactive power stores energy but doesn't dissipate it. Not heat dissipation, not Coulomb forces, not field formation dissipation - just energy storage, no dissipation.
Memory Aid
"Reactive power in ideal L/C = energy stored in fields, power not dissipated. Think 'R'eactive 'P'ower = 'S'tores, 'N'ot 'D'issipated. Reactive power stores energy but doesn't dissipate it. Important for power theory."
Real-World Application
Reactive power in ideal inductors and capacitors: Energy is stored in magnetic or electric fields, but power is not dissipated. The energy oscillates between the fields but is not lost as heat. This is what happens - energy storage, no dissipation.
Key Concepts
Why Other Options Are Wrong
Option A: Incorrect. Dissipated as heat isn't correct - reactive power stores energy, doesn't dissipate. Heat dissipation is wrong.
Option C: Incorrect. Canceled by Coulomb forces isn't correct - reactive power stores energy in fields. Coulomb forces isn't the mechanism.
Option D: Incorrect. Dissipated in formation of fields isn't correct - reactive power stores energy, doesn't dissipate. Field formation dissipation is wrong.
题目解析
The correct answer is B: Energy is stored in magnetic or electric fields, but power is not dissipated. What happens to reactive power in ideal inductors and capacitors is that energy is stored in magnetic or electric fields, but power is not dissipated. Reactive power stores energy but doesn't dissipate it. For amateur radio operators, this is important for power theory. Understanding this helps when calculating power.
考试技巧
Reactive power in ideal L/C = energy stored in fields, power not dissipated. Think 'R'eactive 'P'ower = 'R'eturns 'P'eriodically (stores, doesn't dissipate). Reactive power stores energy but doesn't dissipate it. Not heat dissipation, not Coulomb forces, not field formation dissipation - just energy storage, no dissipation.
记忆口诀
Reactive power in ideal L/C = energy stored in fields, power not dissipated. Think 'R'eactive 'P'ower = 'S'tores, 'N'ot 'D'issipated. Reactive power stores energy but doesn't dissipate it. Important for power theory.
实际应用示例
Reactive power in ideal inductors and capacitors: Energy is stored in magnetic or electric fields, but power is not dissipated. The energy oscillates between the fields but is not lost as heat. This is what happens - energy storage, no dissipation.
错误选项分析
Option A: Incorrect. Dissipated as heat isn't correct - reactive power stores energy, doesn't dissipate. Heat dissipation is wrong. Option C: Incorrect. Canceled by Coulomb forces isn't correct - reactive power stores energy in fields. Coulomb forces isn't the mechanism. Option D: Incorrect. Dissipated in formation of fields isn't correct - reactive power stores energy, doesn't dissipate. Field formation dissipation is wrong.
知识点
Reactive power, Ideal inductors and capacitors, Energy stored, Magnetic or electric fields, Power not dissipated
Verified Content
Question from official FCC Extra Class question pool. Explanation reviewed by licensed amateur radio operators.