SSC Exam > SSC Questions > Three equal impedances are first connected in...
Start Learning for Free
Three equal impedances are first connected in delta across a 3-phase balanced supply. If the same impedances are connected in star across the same supply
- a)phase currents will be 1/3 of the previous value.
- b)1/3 line currents will be of the previous value.
- c)power consumed will be 1/3 of the previous value.
- d)power consumed will be 3 times the previous value.
Correct answer is option 'C'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Verified Answer
Three equal impedances are first connected in delta across a 3-phase b...
When three equal Impedances connected in delta across 3 – phase balanced supply, if they are connected in star power consumption will be 1/3rd of previous consumption.
Most Upvoted Answer
Three equal impedances are first connected in delta across a 3-phase b...
Explanation:
Delta and Star Connections:
In a 3-phase system, the loads can be connected in two ways, i.e., delta and star connections. In a delta connection, three loads are connected in a triangle, whereas in a star connection, three loads are connected in a star-like configuration.
Impedance in Delta and Star Connections:
In a delta connection, the impedance of each load is equal to the impedance between any two terminals of the delta connection. In a star connection, the impedance of each load is equal to the impedance between any one terminal and the neutral point of the star connection.
Phase and Line Currents:
In a 3-phase system, the phase current is the current flowing through each load, whereas the line current is the current flowing through the line connecting the loads.
Power Consumed:
The power consumed by a load in a 3-phase system is given by the product of the phase voltage, phase current, and power factor.
Answer:
When the same equal impedances are connected in delta across a 3-phase balanced supply, the phase current and line current are the same, and the power consumed is proportional to the product of phase voltage and phase current.
When the same impedances are connected in star across the same supply, the phase current is 1/√3 times the previous value, and the line current is 1/3 times the previous value. The power consumed is proportional to the product of phase voltage, phase current, and power factor. As the power factor remains the same, the power consumed will be 1/3 of the previous value.
Hence, the correct answer is option 'C'.
Delta and Star Connections:
In a 3-phase system, the loads can be connected in two ways, i.e., delta and star connections. In a delta connection, three loads are connected in a triangle, whereas in a star connection, three loads are connected in a star-like configuration.
Impedance in Delta and Star Connections:
In a delta connection, the impedance of each load is equal to the impedance between any two terminals of the delta connection. In a star connection, the impedance of each load is equal to the impedance between any one terminal and the neutral point of the star connection.
Phase and Line Currents:
In a 3-phase system, the phase current is the current flowing through each load, whereas the line current is the current flowing through the line connecting the loads.
Power Consumed:
The power consumed by a load in a 3-phase system is given by the product of the phase voltage, phase current, and power factor.
Answer:
When the same equal impedances are connected in delta across a 3-phase balanced supply, the phase current and line current are the same, and the power consumed is proportional to the product of phase voltage and phase current.
When the same impedances are connected in star across the same supply, the phase current is 1/√3 times the previous value, and the line current is 1/3 times the previous value. The power consumed is proportional to the product of phase voltage, phase current, and power factor. As the power factor remains the same, the power consumed will be 1/3 of the previous value.
Hence, the correct answer is option 'C'.
|
Explore Courses for SSC exam
|
|
Similar SSC Doubts
Three equal impedances are first connected in delta across a 3-phase balanced supply. If the same impedances are connected in star across the same supplya)phase currents will be 1/3 of the previous value.b)1/3 line currents will be of the previous value.c)power consumed will be1/3of the previous value.d)power consumed will be 3 times the previous value.Correct answer is option 'C'. Can you explain this answer?
Question Description
Three equal impedances are first connected in delta across a 3-phase balanced supply. If the same impedances are connected in star across the same supplya)phase currents will be 1/3 of the previous value.b)1/3 line currents will be of the previous value.c)power consumed will be1/3of the previous value.d)power consumed will be 3 times the previous value.Correct answer is option 'C'. Can you explain this answer? for SSC 2024 is part of SSC preparation. The Question and answers have been prepared according to the SSC exam syllabus. Information about Three equal impedances are first connected in delta across a 3-phase balanced supply. If the same impedances are connected in star across the same supplya)phase currents will be 1/3 of the previous value.b)1/3 line currents will be of the previous value.c)power consumed will be1/3of the previous value.d)power consumed will be 3 times the previous value.Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for SSC 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Three equal impedances are first connected in delta across a 3-phase balanced supply. If the same impedances are connected in star across the same supplya)phase currents will be 1/3 of the previous value.b)1/3 line currents will be of the previous value.c)power consumed will be1/3of the previous value.d)power consumed will be 3 times the previous value.Correct answer is option 'C'. Can you explain this answer?.
Three equal impedances are first connected in delta across a 3-phase balanced supply. If the same impedances are connected in star across the same supplya)phase currents will be 1/3 of the previous value.b)1/3 line currents will be of the previous value.c)power consumed will be1/3of the previous value.d)power consumed will be 3 times the previous value.Correct answer is option 'C'. Can you explain this answer? for SSC 2024 is part of SSC preparation. The Question and answers have been prepared according to the SSC exam syllabus. Information about Three equal impedances are first connected in delta across a 3-phase balanced supply. If the same impedances are connected in star across the same supplya)phase currents will be 1/3 of the previous value.b)1/3 line currents will be of the previous value.c)power consumed will be1/3of the previous value.d)power consumed will be 3 times the previous value.Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for SSC 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Three equal impedances are first connected in delta across a 3-phase balanced supply. If the same impedances are connected in star across the same supplya)phase currents will be 1/3 of the previous value.b)1/3 line currents will be of the previous value.c)power consumed will be1/3of the previous value.d)power consumed will be 3 times the previous value.Correct answer is option 'C'. Can you explain this answer?.
Solutions for Three equal impedances are first connected in delta across a 3-phase balanced supply. If the same impedances are connected in star across the same supplya)phase currents will be 1/3 of the previous value.b)1/3 line currents will be of the previous value.c)power consumed will be1/3of the previous value.d)power consumed will be 3 times the previous value.Correct answer is option 'C'. Can you explain this answer? in English & in Hindi are available as part of our courses for SSC.
Download more important topics, notes, lectures and mock test series for SSC Exam by signing up for free.
Here you can find the meaning of Three equal impedances are first connected in delta across a 3-phase balanced supply. If the same impedances are connected in star across the same supplya)phase currents will be 1/3 of the previous value.b)1/3 line currents will be of the previous value.c)power consumed will be1/3of the previous value.d)power consumed will be 3 times the previous value.Correct answer is option 'C'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
Three equal impedances are first connected in delta across a 3-phase balanced supply. If the same impedances are connected in star across the same supplya)phase currents will be 1/3 of the previous value.b)1/3 line currents will be of the previous value.c)power consumed will be1/3of the previous value.d)power consumed will be 3 times the previous value.Correct answer is option 'C'. Can you explain this answer?, a detailed solution for Three equal impedances are first connected in delta across a 3-phase balanced supply. If the same impedances are connected in star across the same supplya)phase currents will be 1/3 of the previous value.b)1/3 line currents will be of the previous value.c)power consumed will be1/3of the previous value.d)power consumed will be 3 times the previous value.Correct answer is option 'C'. Can you explain this answer? has been provided alongside types of Three equal impedances are first connected in delta across a 3-phase balanced supply. If the same impedances are connected in star across the same supplya)phase currents will be 1/3 of the previous value.b)1/3 line currents will be of the previous value.c)power consumed will be1/3of the previous value.d)power consumed will be 3 times the previous value.Correct answer is option 'C'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Three equal impedances are first connected in delta across a 3-phase balanced supply. If the same impedances are connected in star across the same supplya)phase currents will be 1/3 of the previous value.b)1/3 line currents will be of the previous value.c)power consumed will be1/3of the previous value.d)power consumed will be 3 times the previous value.Correct answer is option 'C'. Can you explain this answer? tests, examples and also practice SSC tests.
|
|
Explore Courses for SSC exam
|
|
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup