How do ferrite and powdered iron compare for use in an inductor core?
The correct answer is C: Ferrite cores generally require fewer turns to produce a given inductance value. How do ferrite and powdered iron compare for use in an inductor core is that ferrite cores generally require fewer turns to produce a given inductance value. Ferrite has higher permeability, so fewer turns are needed. For amateur radio operators, this is important for component knowledge. Understanding this helps when selecting core materials.
Exam Tip
Ferrite vs powdered iron = ferrite requires fewer turns for given inductance. Think 'F'errite = 'F'ewer turns (higher permeability). Ferrite has higher permeability, so fewer turns are needed. Not lower permeability, not better temperature stability, not surface-mount - just fewer turns.
Memory Aid
"Ferrite vs powdered iron = ferrite requires fewer turns for given inductance. Think 'F'errite = 'F'ewer turns. Ferrite has higher permeability, so fewer turns are needed. Important for component knowledge."
Real-World Application
Ferrite and powdered iron for inductor cores: Ferrite cores generally require fewer turns to produce a given inductance value. This is because ferrite has higher permeability than powdered iron. This is the comparison - ferrite requires fewer turns.
Key Concepts
Why Other Options Are Wrong
Option A: Incorrect. Ferrite cores generally have lower initial permeability isn't correct - ferrite has higher permeability. Lower permeability is wrong.
Option B: Incorrect. Ferrite cores generally have better temperature stability isn't correct - powdered iron has better temperature stability. Better temperature stability is wrong.
Option D: Incorrect. Ferrite cores easier to use with surface-mount technology isn't the comparison - ferrite requires fewer turns. Surface-mount isn't the comparison.
题目解析
The correct answer is C: Ferrite cores generally require fewer turns to produce a given inductance value. How do ferrite and powdered iron compare for use in an inductor core is that ferrite cores generally require fewer turns to produce a given inductance value. Ferrite has higher permeability, so fewer turns are needed. For amateur radio operators, this is important for component knowledge. Understanding this helps when selecting core materials.
考试技巧
Ferrite vs powdered iron = ferrite requires fewer turns for given inductance. Think 'F'errite = 'F'ewer turns (higher permeability). Ferrite has higher permeability, so fewer turns are needed. Not lower permeability, not better temperature stability, not surface-mount - just fewer turns.
记忆口诀
Ferrite vs powdered iron = ferrite requires fewer turns for given inductance. Think 'F'errite = 'F'ewer turns. Ferrite has higher permeability, so fewer turns are needed. Important for component knowledge.
实际应用示例
Ferrite and powdered iron for inductor cores: Ferrite cores generally require fewer turns to produce a given inductance value. This is because ferrite has higher permeability than powdered iron. This is the comparison - ferrite requires fewer turns.
错误选项分析
Option A: Incorrect. Ferrite cores generally have lower initial permeability isn't correct - ferrite has higher permeability. Lower permeability is wrong. Option B: Incorrect. Ferrite cores generally have better temperature stability isn't correct - powdered iron has better temperature stability. Better temperature stability is wrong. Option D: Incorrect. Ferrite cores easier to use with surface-mount technology isn't the comparison - ferrite requires fewer turns. Surface-mount isn't the comparison.
知识点
Ferrite and powdered iron, Compare, Inductor core, Ferrite cores require fewer turns, Given inductance value
Verified Content
Question from official FCC Extra Class question pool. Explanation reviewed by licensed amateur radio operators.