# Impedance

**Definition:** 1) The total opposing force to the flow of current in an ac circuit. 2) The combination of resistance and reactance affecting the flow of an alternating current generally expressed in ohms.

## Related Links

Electrical impedance – Wikipedia

What is impedance? – Definition from WhatIs.com

Impedance | Define Impedance at Dictionary.com

Impedance (video) | AC circuit analysis | Khan Academy

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