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The statements which support the points that auto transformers are disadvantageous as compared to 2-winding transformer
I. Weight of conductor reduces
II. Direct electrical contacts
III. Leakage reactance reduces
IV. Lower short-circuit current
I. Weight of conductor reduces
II. Direct electrical contacts
III. Leakage reactance reduces
IV. Lower short-circuit current
- a)I,III
- b)II,III
- c)II,IV
- d)I,II,IV
Correct answer is option 'C'. Can you explain this answer?
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Verified Answer
The statements which support the points that auto transformers are dis...
Direct electrical contacts is a disadvantage to the auto transformer.
Short circuit current of the auto transformer is higher than the corresponding 2-winding transformer.
Short circuit current of the auto transformer is higher than the corresponding 2-winding transformer.
Most Upvoted Answer
The statements which support the points that auto transformers are dis...
Introduction:
Auto transformers and 2-winding transformers are both types of transformers used in electrical systems. Auto transformers have a single winding that acts as both the primary and secondary winding, while 2-winding transformers have separate windings for the primary and secondary circuits. In this question, we need to identify the statements that support the points that auto transformers are disadvantageous compared to 2-winding transformers.
Explanation:
Let's analyze each statement one by one:
I. Weight of conductor reduces:
- This statement is not a disadvantage of auto transformers because the weight of the conductor does not necessarily reduce in auto transformers compared to 2-winding transformers. The weight of the conductor depends on the size and power rating of the transformer, not on its type.
II. Direct electrical contacts:
- This statement is an advantage of auto transformers over 2-winding transformers. In auto transformers, there are direct electrical contacts between the primary and secondary windings, which results in a lower impedance and voltage drop compared to 2-winding transformers. This can be beneficial in reducing losses and improving voltage regulation.
III. Leakage reactance reduces:
- This statement is a disadvantage of auto transformers compared to 2-winding transformers. In auto transformers, the leakage reactance is lower than in 2-winding transformers. This can result in a higher short-circuit current and lower fault impedance, which can be a safety concern in certain applications.
IV. Lower short-circuit current:
- This statement is an advantage of auto transformers over 2-winding transformers. Auto transformers have a lower short-circuit current compared to 2-winding transformers, which can reduce the stress on the electrical system during fault conditions.
Conclusion:
Based on the analysis above, the statements that support the points that auto transformers are disadvantageous compared to 2-winding transformers are II (direct electrical contacts) and IV (lower short-circuit current). Therefore, the correct answer is option 'C' (II, IV).
Auto transformers and 2-winding transformers are both types of transformers used in electrical systems. Auto transformers have a single winding that acts as both the primary and secondary winding, while 2-winding transformers have separate windings for the primary and secondary circuits. In this question, we need to identify the statements that support the points that auto transformers are disadvantageous compared to 2-winding transformers.
Explanation:
Let's analyze each statement one by one:
I. Weight of conductor reduces:
- This statement is not a disadvantage of auto transformers because the weight of the conductor does not necessarily reduce in auto transformers compared to 2-winding transformers. The weight of the conductor depends on the size and power rating of the transformer, not on its type.
II. Direct electrical contacts:
- This statement is an advantage of auto transformers over 2-winding transformers. In auto transformers, there are direct electrical contacts between the primary and secondary windings, which results in a lower impedance and voltage drop compared to 2-winding transformers. This can be beneficial in reducing losses and improving voltage regulation.
III. Leakage reactance reduces:
- This statement is a disadvantage of auto transformers compared to 2-winding transformers. In auto transformers, the leakage reactance is lower than in 2-winding transformers. This can result in a higher short-circuit current and lower fault impedance, which can be a safety concern in certain applications.
IV. Lower short-circuit current:
- This statement is an advantage of auto transformers over 2-winding transformers. Auto transformers have a lower short-circuit current compared to 2-winding transformers, which can reduce the stress on the electrical system during fault conditions.
Conclusion:
Based on the analysis above, the statements that support the points that auto transformers are disadvantageous compared to 2-winding transformers are II (direct electrical contacts) and IV (lower short-circuit current). Therefore, the correct answer is option 'C' (II, IV).
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The statements which support the points that auto transformers are disadvantageous as compared to 2-winding transformerI. Weight of conductor reducesII. Direct electrical contactsIII. Leakage reactance reducesIV. Lower short-circuit currenta)I,IIIb)II,IIIc)II,IVd)I,II,IVCorrect answer is option 'C'. Can you explain this answer?
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