What is an advantage of using a ferrite core toroidal inductor?
The correct answer is D: All these choices are correct. Advantages of using a ferrite core toroidal inductor include: large values of inductance may be obtained, the magnetic properties of the core may be optimized for a specific range of frequencies, and most of the magnetic field is contained in the core. All three are advantages. For amateur radio operators, this explains why toroidal inductors are popular. Understanding this helps when designing inductors.
Exam Tip
All three are ferrite toroid advantages: large inductance, optimized frequency range, contained magnetic field. When all listed advantages apply to ferrite core toroidal inductors, 'all of the above' is usually the answer. All are key advantages.
Memory Aid
"All three are advantages: Large inductance, Optimized frequency range, Contained magnetic field. Think 'A'll 'F'errite 'T'oroid 'A'dvantages. All three are key advantages of ferrite core toroidal inductors."
Real-World Application
You use a ferrite core toroidal inductor: (1) You can get large inductance values in a small package, (2) You can select a ferrite mix optimized for your frequency range, (3) Most of the magnetic field is contained in the core, reducing interference. All three are advantages of toroidal inductors.
Key Concepts
Why Other Options Are Wrong
Option A: While correct, this is incomplete. Frequency optimization and contained field are also advantages.
Option B: While correct, this is incomplete. Large inductance and contained field are also advantages.
Option C: While correct, this is incomplete. Large inductance and frequency optimization are also advantages.
题目解析
The correct answer is D: All these choices are correct. Advantages of using a ferrite core toroidal inductor include: large values of inductance may be obtained, the magnetic properties of the core may be optimized for a specific range of frequencies, and most of the magnetic field is contained in the core. All three are advantages. For amateur radio operators, this explains why toroidal inductors are popular. Understanding this helps when designing inductors.
考试技巧
All three are ferrite toroid advantages: large inductance, optimized frequency range, contained magnetic field. When all listed advantages apply to ferrite core toroidal inductors, 'all of the above' is usually the answer. All are key advantages.
记忆口诀
All three are advantages: Large inductance, Optimized frequency range, Contained magnetic field. Think 'A'll 'F'errite 'T'oroid 'A'dvantages. All three are key advantages of ferrite core toroidal inductors.
实际应用示例
You use a ferrite core toroidal inductor: (1) You can get large inductance values in a small package, (2) You can select a ferrite mix optimized for your frequency range, (3) Most of the magnetic field is contained in the core, reducing interference. All three are advantages of toroidal inductors.
错误选项分析
Option A: While correct, this is incomplete. Frequency optimization and contained field are also advantages. Option B: While correct, this is incomplete. Large inductance and contained field are also advantages. Option C: While correct, this is incomplete. Large inductance and frequency optimization are also advantages.
知识点
Ferrite core toroidal inductor, Large inductance, Optimized frequency range, Contained magnetic field
Verified Content
Question from official FCC General Class question pool. Explanation reviewed by licensed amateur radio operators.