USCG Exam PracticeDC circuits and electronic principles
Three resistors are connected in parallel across a 24 V DC supply. A technician opens one branch by removing its resistor. What happens to the voltage across the remaining two branches?
- A. The voltage across each remaining branch drops proportionally.
- ✓ The voltage across each remaining branch remains 24 V.Correct
- C. The full 24 V appears only across the open branch; the others read zero.
- D. The voltage redistributes so the two remaining branches share 12 V each.
Why B is correct
NEETS Mod. 1 §3-3 establishes that in a parallel circuit the same voltage appears across every branch (Et = E1 = E2 = E3). Removing one branch opens that path but does not alter the supply voltage applied to the remaining branches.
Cited:NEETS Mod. 1 §3-3