Impedance is measured in what units?

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Prepare for the ASA Aviation Maintenance Technician General Test. Utilize flashcards and multiple-choice questions with hints and explanations. Ace your exam!

Multiple Choice

Impedance is measured in what units?

Explanation:
Impedance represents opposition to current flow in an AC circuit and is expressed in ohms. Since impedance is defined as Z = V / I, the unit is volts per ampere, which is the ohm. This single value, in ohms, captures both resistance and reactance. The other quantities use amperes (current), volts (voltage), or watts (power), so they aren’t the unit for impedance.

Impedance represents opposition to current flow in an AC circuit and is expressed in ohms. Since impedance is defined as Z = V / I, the unit is volts per ampere, which is the ohm. This single value, in ohms, captures both resistance and reactance. The other quantities use amperes (current), volts (voltage), or watts (power), so they aren’t the unit for impedance.

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