Red Seal Electrician Practice
DC circuitsQuestion 759 of 1506

An unbalanced bridge circuit is hard to solve with series and parallel rules. What can be done?

  1. Measure only the source voltage
  2. Replace the source with a larger battery and a thicker wire
  3. Remove the bridge resistor and then measure the voltage across the gap
  4. Convert half of it from delta to Y to make a series-parallel circuit
Show answer

Correct answer: Convert half of it from delta to Y to make a series-parallel circuit

The delta-Y conversion changes the bridge into a series-parallel circuit that is simple to solve.

Source: Lessons in Electric Circuits I: DC (Kuphaldt), 10.13: Δ-Y and Y-Δ Conversions

Practice dc circuits

Questions last reviewed: 18 October 2026