Question 1 of 10
In a balanced 3-phase system, what is the phase difference between each phase current?
The phase difference between each phase current in a balanced 3-phase system is 120 degrees.
Question 2 of 10
What is the algebraic sum of the instantaneous currents in a balanced 3-phase system?
The algebraic sum of the instantaneous currents in a balanced 3-phase system is always zero.
Question 3 of 10
The arrow symbols in a 3-phase current diagram represent:
The arrow symbols indicate the current directions when they are assumed positive.
Question 4 of 10
In a 3-phase system, what acts as the return path for the currents?
Each conductor provides a return path for the currents of the other conductors.
Question 5 of 10
If the current in the R phase is leaving at a particular instant, after how many degrees will the current leave from the Y phase?
The current in the Y phase leaves 120 degrees after the R phase.
Question 6 of 10
What is the peak value of current mentioned in the example given in the article?
The peak value of the current is given as 8A in the example provided in the text.
Question 7 of 10
At point 'a', if IR and IB are +4A, what is the value of IY?
At any instant, the sum of all three currents equals zero. If IR and IB are +4A, then IY must be -8A to balance the currents.
Question 8 of 10
Which of the following is NOT a characteristic of a balanced 3-phase system?
In a balanced system, the current in the neutral wire is zero if there are no neutral connections, or is zero if the loads are equal.
Question 9 of 10
What type of connection is the article explaining?
The article is primarily explaining concepts related to the Star/Delta connections.
Question 10 of 10
What is the purpose of the Y-? 3-phase motor starting method?
The Y-? method is used to reduce the inrush current during motor starting.
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