Red Seal Electrician Practice
DC circuitsQuestion 1349 of 1506

Two resistors, 30 Ω and 20 Ω, are connected in series across a 208 V supply. What is the voltage drop across the 20 Ω resistor?

  1. 83.2 V
  2. 124.8 V
  3. 104 V
  4. 139 V
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Correct answer: 83.2 V

Voltage divides in proportion to resistance: 208 V × 20 ÷ (30 + 20) = 83.2 V.

Source: Computed, 6.1: Voltage Divider Circuits

Practice dc circuits

Questions last reviewed: 18 October 2026