What is the result of conductor skin effect?
The correct answer is A: Resistance increases as frequency increases because RF current flows closer to the surface. What is the result of conductor skin effect is that resistance increases as frequency increases because RF current flows closer to the surface. Skin effect causes current to concentrate near the surface at high frequencies. For amateur radio operators, this is important for understanding RF losses. Understanding this helps when working with RF circuits.
Exam Tip
Skin effect result = resistance increases as frequency increases because RF current flows closer to surface. Think 'S'kin 'E'ffect = 'S'urface 'E'ffect (current near surface). Skin effect causes current to concentrate near the surface at high frequencies. Not decrease, not temperature - just frequency increase increases resistance.
Memory Aid
"Skin effect result = resistance increases as frequency increases because RF current flows closer to surface. Think 'S'kin 'E'ffect = 'F'requency increases 'R'esistance. Skin effect causes current to concentrate near the surface at high frequencies. Important for understanding RF losses."
Real-World Application
Conductor skin effect: The result is that resistance increases as frequency increases because RF current flows closer to the surface. At high frequencies, current is forced to the outer surface of the conductor, reducing the effective cross-sectional area and increasing resistance. This is the result - increased resistance with frequency.
Key Concepts
Why Other Options Are Wrong
Option B: Incorrect. Resistance decreases as frequency increases isn't correct - skin effect increases resistance. Decrease is wrong.
Option C: Incorrect. Resistance increases as temperature increases isn't skin effect - skin effect is frequency-related. Temperature isn't skin effect.
Option D: Incorrect. Resistance decreases as temperature increases isn't skin effect - skin effect is frequency-related. Temperature isn't skin effect.
题目解析
The correct answer is A: Resistance increases as frequency increases because RF current flows closer to the surface. What is the result of conductor skin effect is that resistance increases as frequency increases because RF current flows closer to the surface. Skin effect causes current to concentrate near the surface at high frequencies. For amateur radio operators, this is important for understanding RF losses. Understanding this helps when working with RF circuits.
考试技巧
Skin effect result = resistance increases as frequency increases because RF current flows closer to surface. Think 'S'kin 'E'ffect = 'S'urface 'E'ffect (current near surface). Skin effect causes current to concentrate near the surface at high frequencies. Not decrease, not temperature - just frequency increase increases resistance.
记忆口诀
Skin effect result = resistance increases as frequency increases because RF current flows closer to surface. Think 'S'kin 'E'ffect = 'F'requency increases 'R'esistance. Skin effect causes current to concentrate near the surface at high frequencies. Important for understanding RF losses.
实际应用示例
Conductor skin effect: The result is that resistance increases as frequency increases because RF current flows closer to the surface. At high frequencies, current is forced to the outer surface of the conductor, reducing the effective cross-sectional area and increasing resistance. This is the result - increased resistance with frequency.
错误选项分析
Option B: Incorrect. Resistance decreases as frequency increases isn't correct - skin effect increases resistance. Decrease is wrong. Option C: Incorrect. Resistance increases as temperature increases isn't skin effect - skin effect is frequency-related. Temperature isn't skin effect. Option D: Incorrect. Resistance decreases as temperature increases isn't skin effect - skin effect is frequency-related. Temperature isn't skin effect.
知识点
Conductor skin effect, Resistance increases, Frequency increases, RF current flows closer to surface
Verified Content
Question from official FCC Extra Class question pool. Explanation reviewed by licensed amateur radio operators.