DC circuitsQuestion 421 of 1506

An electrician plans to connect two power sources in parallel. What must be true of the sources?

  1. They must have different voltages so they share the load
  2. They must have the same terminal voltage and matching polarity
  3. They must be connected positive to negative
  4. They must have the same current rating only
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Correct answer: They must have the same terminal voltage and matching polarity

A lower-voltage source acts as a load, and reversed polarity is not allowed.

Source: Electrical Fundamentals Competency (Industry Training Authority of BC), 7.3: Voltage Source Circuits

Practice dc circuits

Questions last reviewed: 18 October 2026