1. What is Impedance?

Impedance (Z) is the measure of opposition that a circuit presents to a current when a voltage is applied. In DC circuits, it's equivalent to resistance, while in AC circuits it includes both resistance and reactance.

2. How Does the Calculator Work?

The calculator uses the fundamental impedance equation:

Where:

• \( Z \) — Impedance (Ω)
• \( V \) — Voltage (V)
• \( I \) — Current (A)

Explanation: The equation shows that impedance is directly proportional to voltage and inversely proportional to current.

3. Importance of Impedance Calculation

Details: Calculating impedance is essential for designing electrical circuits, analyzing power systems, and troubleshooting electrical problems.

4. Using the Calculator

Tips: Enter voltage in volts (V) and current in amperes (A). Both values must be positive numbers greater than zero.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between impedance and resistance?
A: Resistance applies to DC circuits only, while impedance includes both resistance and reactance (for AC circuits).

Q2: What are typical impedance values?
A: Impedance values vary widely depending on the circuit. Common values range from a few ohms to several thousand ohms.

Q3: Can this calculator be used for AC circuits?
A: This simple version calculates magnitude only. For AC circuits, phase angle calculations would be needed for complete impedance.

Q4: What units should I use?
A: Use volts for voltage and amperes for current to get impedance in ohms (Ω).

Q5: What if I get zero or infinite impedance?
A: Zero impedance suggests a short circuit, while infinite impedance suggests an open circuit.