Hey guys,
I would like to get your input on whether Problem 8 from PPI Exam 1 is worded correctly compared to its solution.
PPI Exam 1 Problem 8 states: "A complex unbalanced load of 500 + j300 VA is connected across Phase A and Phase C." This question asks for the neutral current.
When I saw that statement, I was thinking only one complex load (S 1-ph) connected across Phases A and B, so its voltage should be line-to-line voltage V AC (or V CA).
But when I look at the solution for Problem 8, it has I N = I A + I C = (S A / V A) + (S C / V C). That means 2 loads, one connected between A and N, and one connected between C and N. To me, this differs from what is stated by the Problem 8 statement.
What do you think?
Also, the NCEES practice exam has a problem (NCEES question 110) with one complex load connected across 2 phases. It's why I thought of that when I first saw this PPI exam problem.
What are your thoughts?
I would like to get your input on whether Problem 8 from PPI Exam 1 is worded correctly compared to its solution.
PPI Exam 1 Problem 8 states: "A complex unbalanced load of 500 + j300 VA is connected across Phase A and Phase C." This question asks for the neutral current.
When I saw that statement, I was thinking only one complex load (S 1-ph) connected across Phases A and B, so its voltage should be line-to-line voltage V AC (or V CA).
But when I look at the solution for Problem 8, it has I N = I A + I C = (S A / V A) + (S C / V C). That means 2 loads, one connected between A and N, and one connected between C and N. To me, this differs from what is stated by the Problem 8 statement.
What do you think?
Also, the NCEES practice exam has a problem (NCEES question 110) with one complex load connected across 2 phases. It's why I thought of that when I first saw this PPI exam problem.
What are your thoughts?
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