1. What is Inductive Reactance?

Inductive reactance (X_L) is the opposition that an inductor presents to alternating current. It increases with both frequency and inductance, measured in ohms (Ω).

2. How Does the Calculator Work?

The calculator uses the inductive reactance formula:

Where:

• \( X_L \) — Inductive reactance (Ω)
• \( f \) — Frequency (Hz)
• \( L \) — Inductance (H)
• \( \pi \) — Pi constant (~3.14159)

Explanation: The reactance increases linearly with frequency and inductance. At DC (0 Hz), the reactance is 0 Ω.

3. Importance of Inductive Reactance

Details: Understanding inductive reactance is crucial for designing AC circuits, filters, impedance matching, and analyzing circuit behavior at different frequencies.

4. Using the Calculator

Tips: Enter frequency in hertz (Hz) and inductance in henries (H). Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: How does reactance differ from resistance?
A: Reactance opposes AC current while resistance opposes both AC and DC. Reactance varies with frequency while resistance doesn't.

Q2: What happens at resonance?
A: When inductive reactance equals capacitive reactance, resonance occurs, creating special circuit behavior.

Q3: Why does reactance increase with frequency?
A: Higher frequencies cause faster current changes, inducing stronger opposing voltages in the inductor.

Q4: What about real inductors?
A: Real inductors also have some resistance and parasitic capacitance that affect their behavior.

Q5: How is reactance used in filters?
A: Inductors are used in low-pass and band-pass filters because their reactance increases with frequency.