Red Seal Electrician Practice
DC circuitsQuestion 1354 of 1506

Two resistors, 150 Ω and 50 Ω, are connected in series across a 120 V supply. What is the voltage drop across the 50 Ω resistor?

  1. 90.0 V
  2. 40.0 V
  3. 30.0 V
  4. 60.0 V
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Correct answer: 30.0 V

Voltage divides in proportion to resistance: 120 V × 50 ÷ (150 + 50) = 30.0 V.

Source: Computed, 6.1: Voltage Divider Circuits

Practice dc circuits

Questions last reviewed: 18 October 2026