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Question 217

What is impedance?

  1. The ratio of current to voltage
  2. The product of current and voltage
  3. The ratio of voltage to currentCorrect answer
  4. The product of current and reactance

Explanation

Impedance is the AC form of Ohm's law, Z = E / I, so it is voltage divided by current. Current divided by voltage is admittance, and the product of voltage and current is power, not impedance.

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Question 217: What is impedance? · FCC General Class (Element 3) · Questena