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Inductor Impedance Formula:
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Inductor impedance is the opposition that an inductor presents to alternating current (AC). It consists of both resistance and reactance components, with the reactive component being frequency-dependent.
The calculator uses the inductor impedance formula:
Where:
Explanation: The impedance of an ideal inductor increases linearly with both frequency and inductance. At higher frequencies, the inductor offers greater opposition to AC current flow.
Details: Calculating inductor impedance is crucial for designing and analyzing AC circuits, filters, power supplies, and RF applications. It helps determine how inductors will behave in different frequency environments.
Tips: Enter frequency in hertz (Hz) and inductance in henries (H). Both values must be positive numbers. The calculator will compute the impedance in ohms (Ω).
Q1: What is the difference between impedance and resistance?
A: Resistance opposes both DC and AC current, while impedance specifically refers to opposition to AC current and includes both resistive and reactive components.
Q2: Does impedance change with frequency?
A: Yes, for inductors, impedance increases linearly with frequency (Z ∝ f), unlike resistors whose impedance remains constant.
Q3: What is the phase relationship in an ideal inductor?
A: In an ideal inductor, the voltage leads the current by 90 degrees due to the inductive reactance.
Q4: How does real-world inductor differ from ideal?
A: Real inductors have parasitic resistance (wire resistance) and capacitance, which affect their performance at very high frequencies.
Q5: What are common applications of inductors?
A: Inductors are used in filters, transformers, chokes, oscillators, power supplies, and RF circuits for impedance matching and energy storage.