What determines the performance of a ferrite core at different frequencies?
The correct answer is C: The composition, or 'mix,' of materials used. What determines the performance of a ferrite core at different frequencies is the composition, or 'mix,' of materials used. Different ferrite mixes are optimized for different frequency ranges. For amateur radio operators, this is important when selecting ferrite cores. Understanding this helps when designing inductors and transformers.
Exam Tip
Ferrite core performance = composition/mix of materials. Think 'F'errite 'C'ore = 'F'requency 'C'haracteristics depend on 'C'omposition. Different ferrite mixes optimized for different frequency ranges. Not conductivity, not thickness, not diameter ratio - just composition.
Memory Aid
"Ferrite core performance = composition/mix of materials. Think 'F'errite 'C'ore = 'F'requency 'C'haracteristics. Different ferrite mixes optimized for different frequency ranges. Composition determines frequency performance."
Real-World Application
You need a ferrite core for a 1 MHz inductor. You select a ferrite mix optimized for that frequency range. Different ferrite compositions (mixes) have different frequency characteristics - some for low frequencies, some for high frequencies. The composition determines performance.
Key Concepts
Why Other Options Are Wrong
Option A: Incorrect. Conductivity isn't the determining factor - ferrites are insulators, and composition (mix) determines frequency performance, not conductivity.
Option B: Incorrect. Thickness isn't the determining factor - composition determines frequency performance, not physical dimensions.
Option D: Incorrect. Outer/inner diameter ratio isn't the determining factor - composition determines frequency performance, not geometry.
题目解析
The correct answer is C: The composition, or 'mix,' of materials used. What determines the performance of a ferrite core at different frequencies is the composition, or 'mix,' of materials used. Different ferrite mixes are optimized for different frequency ranges. For amateur radio operators, this is important when selecting ferrite cores. Understanding this helps when designing inductors and transformers.
考试技巧
Ferrite core performance = composition/mix of materials. Think 'F'errite 'C'ore = 'F'requency 'C'haracteristics depend on 'C'omposition. Different ferrite mixes optimized for different frequency ranges. Not conductivity, not thickness, not diameter ratio - just composition.
记忆口诀
Ferrite core performance = composition/mix of materials. Think 'F'errite 'C'ore = 'F'requency 'C'haracteristics. Different ferrite mixes optimized for different frequency ranges. Composition determines frequency performance.
实际应用示例
You need a ferrite core for a 1 MHz inductor. You select a ferrite mix optimized for that frequency range. Different ferrite compositions (mixes) have different frequency characteristics - some for low frequencies, some for high frequencies. The composition determines performance.
错误选项分析
Option A: Incorrect. Conductivity isn't the determining factor - ferrites are insulators, and composition (mix) determines frequency performance, not conductivity. Option B: Incorrect. Thickness isn't the determining factor - composition determines frequency performance, not physical dimensions. Option D: Incorrect. Outer/inner diameter ratio isn't the determining factor - composition determines frequency performance, not geometry.
知识点
Ferrite core, Composition, Material mix, Frequency performance
Verified Content
Question from official FCC General Class question pool. Explanation reviewed by licensed amateur radio operators.