Electrical Engineering (EE) Exam > Electrical Engineering (EE) Questions > A 2V/1V two- winding transformer is connected...
Start Learning for Free
A 2V/1V two- winding transformer is connected as an autotransformer. Its voltage regulation as an autotransformer compared to the two-winding transformer is :
- a)the same
- b)1.5 times
- c)2 times
- d)3 times
Correct answer is option 'D'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Most Upvoted Answer
A 2V/1V two- winding transformer is connected as an autotransformer. I...
Autotransformer and Two-Winding Transformer
Before explaining the voltage regulation of a 2V/1V two-winding transformer as an autotransformer, let's first understand the difference between an autotransformer and a two-winding transformer.
- An autotransformer has a single winding that acts as both the primary and secondary winding.
- A two-winding transformer has separate primary and secondary windings.
Voltage Regulation
The voltage regulation of a transformer is defined as the change in secondary voltage from no-load to full-load expressed as a percentage of the full-load voltage. It is given by the formula:
% voltage regulation = (V_no-load - V_full-load) / V_full-load x 100%
Autotransformer Voltage Regulation
When a two-winding transformer is used as an autotransformer, one winding is used as both the primary and secondary winding. In this configuration, the voltage regulation is much better than a two-winding transformer.
The voltage regulation of an autotransformer is given by the formula:
% voltage regulation = (V_no-load - V_full-load) / V_full-load x 100% = (V_in - V_out) / V_out x 100%
Since the input voltage (V_in) and output voltage (V_out) are almost the same in an autotransformer, the voltage regulation is low.
Two-Winding Transformer Voltage Regulation
The voltage regulation of a two-winding transformer is given by the formula:
% voltage regulation = (V_no-load - V_full-load) / V_full-load x 100% = (V_1 - V_2) / V_2 x 100%
where V_1 is the voltage applied to the primary winding, and V_2 is the voltage across the secondary winding.
Since V_1 is much higher than V_2, the voltage regulation is high in a two-winding transformer.
Comparison of Voltage Regulation
As we can see from the above formulas, the voltage regulation of an autotransformer is much lower than that of a two-winding transformer. In fact, the voltage regulation of an autotransformer can be up to three times better than a two-winding transformer.
Therefore, the correct answer is option 'D', i.e., the voltage regulation as an autotransformer compared to the two-winding transformer is three times better.
Before explaining the voltage regulation of a 2V/1V two-winding transformer as an autotransformer, let's first understand the difference between an autotransformer and a two-winding transformer.
- An autotransformer has a single winding that acts as both the primary and secondary winding.
- A two-winding transformer has separate primary and secondary windings.
Voltage Regulation
The voltage regulation of a transformer is defined as the change in secondary voltage from no-load to full-load expressed as a percentage of the full-load voltage. It is given by the formula:
% voltage regulation = (V_no-load - V_full-load) / V_full-load x 100%
Autotransformer Voltage Regulation
When a two-winding transformer is used as an autotransformer, one winding is used as both the primary and secondary winding. In this configuration, the voltage regulation is much better than a two-winding transformer.
The voltage regulation of an autotransformer is given by the formula:
% voltage regulation = (V_no-load - V_full-load) / V_full-load x 100% = (V_in - V_out) / V_out x 100%
Since the input voltage (V_in) and output voltage (V_out) are almost the same in an autotransformer, the voltage regulation is low.
Two-Winding Transformer Voltage Regulation
The voltage regulation of a two-winding transformer is given by the formula:
% voltage regulation = (V_no-load - V_full-load) / V_full-load x 100% = (V_1 - V_2) / V_2 x 100%
where V_1 is the voltage applied to the primary winding, and V_2 is the voltage across the secondary winding.
Since V_1 is much higher than V_2, the voltage regulation is high in a two-winding transformer.
Comparison of Voltage Regulation
As we can see from the above formulas, the voltage regulation of an autotransformer is much lower than that of a two-winding transformer. In fact, the voltage regulation of an autotransformer can be up to three times better than a two-winding transformer.
Therefore, the correct answer is option 'D', i.e., the voltage regulation as an autotransformer compared to the two-winding transformer is three times better.
Free Test
FREE
| Start Free Test |
Community Answer
A 2V/1V two- winding transformer is connected as an autotransformer. I...
The answer is wrong , firstly Remember that Voltage regulation is better if it is lower , not higher , A voltage regulation of 3% is better then 5% .
Now Advantage of auto transformer is that it has Better V regulation then 2 phase transformer . So it is obvious that it should be not in any multiple of V regulation of two phase transformer . Hence the answer given is Technically wrong , you just can't have Auto transformer whose V reg is worse then 2 phase transformer it is made up of .
and if you want practical explanation then V reg of AutoXformer = (1-K) of 2 phase
Put K = 2/3 , 1/3 both values you will get = (1-2/3 ) and (1-1/3) in both of them value is 1/3 and 2/3 times Vreg of 2 phase
So answer is wrong , and wrongly said right in everywhere on internet .
Attention Electrical Engineering (EE) Students!
To make sure you are not studying endlessly, EduRev has designed Electrical Engineering (EE) study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Electrical Engineering (EE).
|
Explore Courses for Electrical Engineering (EE) exam
|
|
Similar Electrical Engineering (EE) Doubts
Top Courses for Electrical Engineering (EE)View all
A 2V/1V two- winding transformer is connected as an autotransformer. Its voltage regulation as an autotransformer compared to the two-winding transformer is :a)the sameb)1.5 timesc)2 timesd)3 timesCorrect answer is option 'D'. Can you explain this answer?
Question Description
A 2V/1V two- winding transformer is connected as an autotransformer. Its voltage regulation as an autotransformer compared to the two-winding transformer is :a)the sameb)1.5 timesc)2 timesd)3 timesCorrect answer is option 'D'. Can you explain this answer? for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about A 2V/1V two- winding transformer is connected as an autotransformer. Its voltage regulation as an autotransformer compared to the two-winding transformer is :a)the sameb)1.5 timesc)2 timesd)3 timesCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A 2V/1V two- winding transformer is connected as an autotransformer. Its voltage regulation as an autotransformer compared to the two-winding transformer is :a)the sameb)1.5 timesc)2 timesd)3 timesCorrect answer is option 'D'. Can you explain this answer?.
A 2V/1V two- winding transformer is connected as an autotransformer. Its voltage regulation as an autotransformer compared to the two-winding transformer is :a)the sameb)1.5 timesc)2 timesd)3 timesCorrect answer is option 'D'. Can you explain this answer? for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about A 2V/1V two- winding transformer is connected as an autotransformer. Its voltage regulation as an autotransformer compared to the two-winding transformer is :a)the sameb)1.5 timesc)2 timesd)3 timesCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A 2V/1V two- winding transformer is connected as an autotransformer. Its voltage regulation as an autotransformer compared to the two-winding transformer is :a)the sameb)1.5 timesc)2 timesd)3 timesCorrect answer is option 'D'. Can you explain this answer?.
Solutions for A 2V/1V two- winding transformer is connected as an autotransformer. Its voltage regulation as an autotransformer compared to the two-winding transformer is :a)the sameb)1.5 timesc)2 timesd)3 timesCorrect answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for Electrical Engineering (EE).
Download more important topics, notes, lectures and mock test series for Electrical Engineering (EE) Exam by signing up for free.
Here you can find the meaning of A 2V/1V two- winding transformer is connected as an autotransformer. Its voltage regulation as an autotransformer compared to the two-winding transformer is :a)the sameb)1.5 timesc)2 timesd)3 timesCorrect answer is option 'D'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
A 2V/1V two- winding transformer is connected as an autotransformer. Its voltage regulation as an autotransformer compared to the two-winding transformer is :a)the sameb)1.5 timesc)2 timesd)3 timesCorrect answer is option 'D'. Can you explain this answer?, a detailed solution for A 2V/1V two- winding transformer is connected as an autotransformer. Its voltage regulation as an autotransformer compared to the two-winding transformer is :a)the sameb)1.5 timesc)2 timesd)3 timesCorrect answer is option 'D'. Can you explain this answer? has been provided alongside types of A 2V/1V two- winding transformer is connected as an autotransformer. Its voltage regulation as an autotransformer compared to the two-winding transformer is :a)the sameb)1.5 timesc)2 timesd)3 timesCorrect answer is option 'D'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice A 2V/1V two- winding transformer is connected as an autotransformer. Its voltage regulation as an autotransformer compared to the two-winding transformer is :a)the sameb)1.5 timesc)2 timesd)3 timesCorrect answer is option 'D'. Can you explain this answer? tests, examples and also practice Electrical Engineering (EE) tests.
|
|
Explore Courses for Electrical Engineering (EE) 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
|
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