USCG Exam PracticeDC circuits and electronic principles
In a parallel circuit, three branch resistors are connected across a 24 V supply. A technician opens one branch completely. 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 voltage across the open branch drops to zero while the other branches share the full 24 V equally.
- D. The total source voltage is now divided among the two remaining branches in series.
Why B is correct
In a parallel circuit the same voltage appears across every branch. An open in one branch removes that branch's current path but does not alter the common voltage applied to the remaining branches, which continue to receive the full 24 V. (NEETS Mod. 1 §3-3)
Cited:NEETS Mod. 1 §3-3