GATE Exam > GATE Questions > A transformer is rated at 90 kVA. At full loa...
Start Learning for Free
A transformer is rated at 90 kVA. At full load its copper losses are 1100W and its iron losses are 950 W. The percentage efficiency of transformer at full load, unity power factor will be A 96.54% B 97.77% C 98.74% D none of above?
Most Upvoted Answer
A transformer is rated at 90 kVA. At full load its copper losses are 1...
Calculation of Efficiency of Transformer at Full Load, Unity Power Factor
Given:
Transformer rating = 90 kVA
Copper losses = 1100 W
Iron losses = 950 W
Copper Losses:
Copper losses are given as 1100 W
Power loss = I^2R
where I = full load current and R = resistance of copper winding
Therefore, I^2R = 1100
Let's assume the resistance of copper winding is 'x' ohms
Then, I^2x = 1100
I^2 = 1100/x
Iron Losses:
Iron losses are given as 950 W
Total Losses:
Total losses = Copper losses + Iron losses
Total losses = 1100 + 950 = 2050 W
Output:
Output = Transformer rating = 90 kVA
Efficiency:
Efficiency = Output / (Output + Total losses)
Efficiency = 90000 / (90000 + 2050)
Efficiency = 0.9777 or 97.77%
Therefore, the correct answer is option B - 97.77%.
Given:
Transformer rating = 90 kVA
Copper losses = 1100 W
Iron losses = 950 W
Copper Losses:
Copper losses are given as 1100 W
Power loss = I^2R
where I = full load current and R = resistance of copper winding
Therefore, I^2R = 1100
Let's assume the resistance of copper winding is 'x' ohms
Then, I^2x = 1100
I^2 = 1100/x
Iron Losses:
Iron losses are given as 950 W
Total Losses:
Total losses = Copper losses + Iron losses
Total losses = 1100 + 950 = 2050 W
Output:
Output = Transformer rating = 90 kVA
Efficiency:
Efficiency = Output / (Output + Total losses)
Efficiency = 90000 / (90000 + 2050)
Efficiency = 0.9777 or 97.77%
Therefore, the correct answer is option B - 97.77%.
Community Answer
A transformer is rated at 90 kVA. At full load its copper losses are 1...
A
|
Explore Courses for GATE exam
|
|
Similar GATE Doubts
A transformer is rated at 90 kVA. At full load its copper losses are 1100W and its iron losses are 950 W. The percentage efficiency of transformer at full load, unity power factor will be A 96.54% B 97.77% C 98.74% D none of above?
Question Description
A transformer is rated at 90 kVA. At full load its copper losses are 1100W and its iron losses are 950 W. The percentage efficiency of transformer at full load, unity power factor will be A 96.54% B 97.77% C 98.74% D none of above? for GATE 2024 is part of GATE preparation. The Question and answers have been prepared according to the GATE exam syllabus. Information about A transformer is rated at 90 kVA. At full load its copper losses are 1100W and its iron losses are 950 W. The percentage efficiency of transformer at full load, unity power factor will be A 96.54% B 97.77% C 98.74% D none of above? covers all topics & solutions for GATE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A transformer is rated at 90 kVA. At full load its copper losses are 1100W and its iron losses are 950 W. The percentage efficiency of transformer at full load, unity power factor will be A 96.54% B 97.77% C 98.74% D none of above?.
A transformer is rated at 90 kVA. At full load its copper losses are 1100W and its iron losses are 950 W. The percentage efficiency of transformer at full load, unity power factor will be A 96.54% B 97.77% C 98.74% D none of above? for GATE 2024 is part of GATE preparation. The Question and answers have been prepared according to the GATE exam syllabus. Information about A transformer is rated at 90 kVA. At full load its copper losses are 1100W and its iron losses are 950 W. The percentage efficiency of transformer at full load, unity power factor will be A 96.54% B 97.77% C 98.74% D none of above? covers all topics & solutions for GATE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A transformer is rated at 90 kVA. At full load its copper losses are 1100W and its iron losses are 950 W. The percentage efficiency of transformer at full load, unity power factor will be A 96.54% B 97.77% C 98.74% D none of above?.
Solutions for A transformer is rated at 90 kVA. At full load its copper losses are 1100W and its iron losses are 950 W. The percentage efficiency of transformer at full load, unity power factor will be A 96.54% B 97.77% C 98.74% D none of above? in English & in Hindi are available as part of our courses for GATE.
Download more important topics, notes, lectures and mock test series for GATE Exam by signing up for free.
Here you can find the meaning of A transformer is rated at 90 kVA. At full load its copper losses are 1100W and its iron losses are 950 W. The percentage efficiency of transformer at full load, unity power factor will be A 96.54% B 97.77% C 98.74% D none of above? defined & explained in the simplest way possible. Besides giving the explanation of
A transformer is rated at 90 kVA. At full load its copper losses are 1100W and its iron losses are 950 W. The percentage efficiency of transformer at full load, unity power factor will be A 96.54% B 97.77% C 98.74% D none of above?, a detailed solution for A transformer is rated at 90 kVA. At full load its copper losses are 1100W and its iron losses are 950 W. The percentage efficiency of transformer at full load, unity power factor will be A 96.54% B 97.77% C 98.74% D none of above? has been provided alongside types of A transformer is rated at 90 kVA. At full load its copper losses are 1100W and its iron losses are 950 W. The percentage efficiency of transformer at full load, unity power factor will be A 96.54% B 97.77% C 98.74% D none of above? theory, EduRev gives you an
ample number of questions to practice A transformer is rated at 90 kVA. At full load its copper losses are 1100W and its iron losses are 950 W. The percentage efficiency of transformer at full load, unity power factor will be A 96.54% B 97.77% C 98.74% D none of above? tests, examples and also practice GATE tests.
|
|
Explore Courses for GATE exam
|
|
Suggested Free Tests
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup