Red Seal Electrician Practice
AC theoryQuestion 988 of 1506

Before reducing a series-parallel R-L-C circuit, what must be done first?

  1. Add up every voltage drop in the circuit
  2. Replace the capacitors with open circuits
  3. Convert everything to watts
  4. Find the impedance of every component
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Correct answer: Find the impedance of every component

All parts must be in the same terms (Z) before they can be combined.

Source: Lessons in Electric Circuits II: AC (Kuphaldt), 5.4: Series-parallel R, L, and C

Practice ac theory

Questions last reviewed: 18 October 2026