Red Seal Electrician Practice
DC circuitsQuestion 678 of 1506

A 48 V supply feeds three resistors in series: 1 kΩ, 3 kΩ and 4 kΩ. What is the voltage across the 3 kΩ resistor?

  1. 24 V
  2. 18 V
  3. 36 V
  4. 16 V
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Correct answer: 18 V

The total is 8 kΩ. The share is 3/8 of 48 V = 18 V.

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

Practice dc circuits

Questions last reviewed: 18 October 2026