The effective resistance of an iron-cored choke working on ordinary supply frequency is more than its true resistance because of____________?
Correct answer: A. iron loss in core
- A. iron loss in core
- B. skin effect
- C. increase in temperature
- D. capacitive effect between adjacent coil turns
Explanation
An iron-cored choke has core losses, such as hysteresis and eddy-current losses, which can be represented as an additional effective resistance. Hence its AC effective resistance exceeds its winding's true resistance.
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