USCG Exam PracticeDC circuits and electronic principles
Two resistors, R1 = 12 Ω and R2 = 6 Ω, are connected in parallel across a 36 V supply. What is the total current drawn from the source?
- A. 2 A
- B. 3 A
- C. 6 A
- ✓ 9 ACorrect
Why D is correct
Branch currents: I1 = 36/12 = 3 A; I2 = 36/6 = 6 A. By Kirchhoff's current law, total current = 3 + 6 = 9 A. Alternatively, Rt = (12 × 6)/(12 + 6) = 4 Ω; It = 36/4 = 9 A. (NEETS Mod. 1 §3-3)
Cited:NEETS Mod. 1 §3-3