DC circuitsQuestion 1347 of 1506

Two resistors, 100 Ω and 200 Ω, are connected in series across a 120 V supply. What is the voltage drop across the 200 Ω resistor?

139 V
40.0 V
80.0 V
60.0 V

Show answer

Correct answer: 80.0 V

Voltage divides in proportion to resistance: 120 V × 200 ÷ (100 + 200) = 80.0 V.

Source: Computed, 6.1: Voltage Divider Circuits

Questions last reviewed: 18 October 2026

Red Seal Electrician Practice needs JavaScript to run. Use its questions for practice. The real pass mark is usually 70%. Check it with your province or territory's apprenticeship office.