Impedance is measured in which unit?

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Prepare for the Michelin ECT Exam. Study with comprehensive flashcards and multiple choice questions, each with detailed hints and explanations. Get ready to excel in your exam!

Multiple Choice

Impedance is measured in which unit?

Explanation:
Impedance is measured in ohms because it represents the ratio of voltage to current in an AC circuit, Z = V / I, so its unit is volts per ampere, the ohm (Ω). In AC analysis, impedance is generally a complex quantity Z = R + jX, with both the resistance and the reactance expressed in ohms, and the magnitude |Z| is also in ohms. For example, if you have a voltage of 5 V and a current of 1 A, the impedance magnitude is 5 Ω. The other units refer to different quantities: henries for inductance, watts for real power, and VARs for reactive power.

Impedance is measured in ohms because it represents the ratio of voltage to current in an AC circuit, Z = V / I, so its unit is volts per ampere, the ohm (Ω). In AC analysis, impedance is generally a complex quantity Z = R + jX, with both the resistance and the reactance expressed in ohms, and the magnitude |Z| is also in ohms. For example, if you have a voltage of 5 V and a current of 1 A, the impedance magnitude is 5 Ω. The other units refer to different quantities: henries for inductance, watts for real power, and VARs for reactive power.

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