Red Seal Electrician Practice
DC circuitsQuestion 672 of 1506

A 12 V source feeds a 2 kΩ resistor and a 4 kΩ resistor in series. What is the voltage across the 4 kΩ resistor?

  1. 24 V
  2. 6 V
  3. 8 V
  4. 4 V
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Correct answer: 8 V

The total is 6 kΩ. The 4 kΩ resistor takes 4/6 of the supply: 12 V × 4/6 = 8 V.

Source: Lessons in Electric Circuits I: DC (Kuphaldt), 6.1: Voltage Divider Circuits

Practice dc circuits

Questions last reviewed: 18 October 2026