Red Seal Electrician Practice
AC theoryQuestion 986 of 1506

After the total current of a parallel AC circuit is found by adding branch currents, how is the total impedance found?

  1. Z = E × I
  2. Z = E / I
  3. Z = I / E
  4. Z = E + I
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Correct answer: Z = E / I

The AC form of Ohm’s law applies to the total column.

Source: Lessons in Electric Circuits II: AC (Kuphaldt), 5.3: Parallel R, L, and C

Practice ac theory

Questions last reviewed: 18 October 2026