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USCG Exam PracticeDC circuits and electronic principles

In a series DC circuit containing three resistors (R1 = 10 Ω, R2 = 20 Ω, R3 = 30 Ω) powered by a 120 V source, what is the voltage drop across R2?

  1. A. 20 V
  2. ✓ 40 VCorrect
  3. C. 60 V
  4. D. 80 V

Why B is correct

NEETS Mod. 1 §3-2: total resistance = 10 + 20 + 30 = 60 Ω; current I = 120/60 = 2 A. Voltage across R2 = I × R2 = 2 × 20 = 40 V. Kirchhoff's voltage law confirms: 20 + 40 + 60 = 120 V.

Cited:NEETS Mod. 1 §3-2

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In a series DC circuit containing three resistors (R1 = 10 Ω, R2 =… — USCG Exam Practice · CaptainsGround