Air-core inductors are essentially devoid of______________?
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Answer: C. both (A) and (B)
Explanation
Air-core inductors lack ferromagnetic core material, meaning they have zero magnetic hysteresis losses. Because they contain no conductive magnetic core, they also experience zero eddy current power losses. Consequently, air-core inductors are entirely devoid of both hysteresis and eddy current loss mechanisms. Hysteresis losses occur when magnetic domains inside iron cores repeatedly reverse direction in alternating fields. Eddy current losses result from circulating electrical currents induced within solid conductive magnetic cores. Air-core coils use non-magnetic materials like plastic or ceramic to support the wire windings.
Radio frequency circuits use air-core inductors to maintain high signal quality and prevent core saturation. Eliminating core losses makes air-core coils ideal for high-frequency telecommunication transmitter circuits. Engineers choose air cores when linearity and low distortion are more important than high inductance values. Stating that only hysteresis losses are absent ignores the simultaneous absence of eddy current losses. Claiming only eddy current losses are missing overlooks the complete lack of magnetic core hysteresis. None of the above is incorrect because air-core inductors successfully lack both types of core losses.
- Subject
- Engineering
- Category
- Electrical Engineering
- Topic
- —
- Difficulty
- medium
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