Question
Which of the following is opposition to the flow of alternating current in an inductor?
Answer Options
- A) Conductance
- B) Reluctance
- C) Admittance
- D) Reactance
Correct Answer: D
Explanation
An inductor resists changes in current flow by generating a counter-electromotive force (EMF) in its coil. When Alternating Current (AC) flows through an inductor, this constant change creates a strong opposition to the current, which increases as the frequency of the AC increases.
This opposition to the flow of AC in an inductor is specifically called inductive reactance (X_L). Since reactance is a component of impedance (Z), it is measured in ohms. Inductive reactance is mathematically defined as X_L = 2\pi f L, showing its direct proportionality to frequency (f) and inductance (L).
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