Red Seal Electrician Practice
DC circuitsQuestion 325 of 1506

What is the first step in solving a series-parallel resistor circuit?

  1. Calculate the power used in each resistor
  2. Find which resistors are in simple series or parallel
  3. Add all the resistors as if they were in series
  4. Measure the source current with an ammeter
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Correct answer: Find which resistors are in simple series or parallel

You must identify the simple groups so you can replace each group with an equivalent resistor.

Source: Troubleshooting Motors and Controls (Dickson-Self), 2.1: Combination Series and Parallel Circuits

Practice dc circuits

Questions last reviewed: 18 October 2026