Red Seal Electrician Practice
DC circuitsQuestion 647 of 1506

Three loads of 40 W, 60 W and 100 W are connected in a series-parallel arrangement. What is the total power the source supplies?

  1. 100 W
  2. 60 W
  3. about 22 W
  4. 200 W
Show answer

Correct answer: 200 W

Power is additive in any circuit configuration: 40 + 60 + 100 = 200 W.

Source: Lessons in Electric Circuits I: DC (Kuphaldt), 5.5: Power Calculations

Practice dc circuits

Questions last reviewed: 18 October 2026