Red Seal Electrician Practice
DC circuitsQuestion 365 of 1506

Three resistors of 8 Ω, 12 Ω and 20 Ω are in series with a 24 V source. What is the voltage drop across the 20 Ω resistor?

  1. 0.6 V
  2. 8 V
  3. 24 V
  4. 12 V
Show answer

Correct answer: 12 V

RT = 40 Ω, I = 24 ÷ 40 = 0.6 A. The drop is 0.6 A × 20 Ω = 12 V.

Source: Electrical Fundamentals Competency (Industry Training Authority of BC), 2.2: Series Circuits

Practice dc circuits

Questions last reviewed: 18 October 2026