Red Seal Electrician Practice
DC circuitsQuestion 409 of 1506

A string of 24 identical lamps is wired in series across a 120 V supply. What is the voltage across each lamp?

  1. 5 V
  2. 120 V
  3. 2.4 V
  4. 10 V
Show answer

Correct answer: 5 V

Equal resistances share the supply equally: 120 V / 24 = 5 V.

Source: Electrical Fundamentals Competency (Industry Training Authority of BC), 7.1: Series Circuits

Practice dc circuits

Questions last reviewed: 18 October 2026