Red Seal Electrician Practice
DC circuitsQuestion 1348 of 1506

Two resistors, 20 Ω and 30 Ω, are connected in series across a 600 V supply. What is the voltage drop across the 30 Ω resistor?

  1. 240 V
  2. 624 V
  3. 360 V
  4. 900 V
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Correct answer: 360 V

Voltage divides in proportion to resistance: 600 V × 30 ÷ (20 + 30) = 360 V.

Source: Computed, 6.1: Voltage Divider Circuits

Practice dc circuits

Questions last reviewed: 18 October 2026