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A dc shunt generator when driven without connecting field winding shows an open circuit terminal voltage of 12V. When field winding is connected and excited, the terminal voltage drops to zero because
- a)field resistance is higher than critical resistance
- b)there is no residual magnetism in the field circuit
- c)field winding has got wrongly connected
- d)there is a fault in armature circuit
Correct answer is option 'C'. Can you explain this answer?
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A dc shunt generator when driven without connecting field winding show...
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If field winding is connected wrongly then residual flux will be eliminated and voltage will drop to zero.
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A dc shunt generator when driven without connecting field winding show...
Introduction:
In a DC shunt generator, the terminal voltage is the voltage measured across the output terminals of the generator. When the field winding is connected and excited, the terminal voltage should be higher than the open circuit voltage. However, in this case, the terminal voltage drops to zero when the field winding is connected.
Explanation:
The correct answer to this question is option 'C' - "The field winding has got wrongly connected". Here's an explanation of why this is the correct answer:
1. Purpose of the field winding:
The field winding in a DC shunt generator is responsible for creating the magnetic field necessary for the generation of electricity. It is usually connected in series with the armature winding and is excited by a separate DC power source.
2. Effect of field winding connection:
When the field winding is connected and excited, it creates a magnetic field that interacts with the armature winding. This interaction induces a voltage in the armature winding, which contributes to the terminal voltage of the generator.
3. Open circuit terminal voltage:
When the field winding is not connected, the generator is in an open circuit condition. In this state, the only voltage present across the terminals is the residual magnetism voltage. This residual magnetism voltage is typically very low, resulting in an open circuit terminal voltage of 12V.
4. Incorrect connection of field winding:
In this scenario, when the field winding is connected, the terminal voltage drops to zero. This indicates that there is a problem with the connection of the field winding. The most likely explanation is that the field winding has been incorrectly connected, resulting in a short circuit or a wrong polarity connection.
5. Consequences of incorrect field winding connection:
When the field winding is incorrectly connected, it can cause a short circuit or a reverse polarity connection. This effectively bypasses the armature winding and prevents the generation of any voltage. As a result, the terminal voltage drops to zero.
Conclusion:
In a DC shunt generator, when the field winding is correctly connected and excited, it should increase the terminal voltage. However, if the terminal voltage drops to zero when the field winding is connected, it indicates that there is a problem with the connection of the field winding. In this case, the correct answer is option 'C' - "The field winding has got wrongly connected".
In a DC shunt generator, the terminal voltage is the voltage measured across the output terminals of the generator. When the field winding is connected and excited, the terminal voltage should be higher than the open circuit voltage. However, in this case, the terminal voltage drops to zero when the field winding is connected.
Explanation:
The correct answer to this question is option 'C' - "The field winding has got wrongly connected". Here's an explanation of why this is the correct answer:
1. Purpose of the field winding:
The field winding in a DC shunt generator is responsible for creating the magnetic field necessary for the generation of electricity. It is usually connected in series with the armature winding and is excited by a separate DC power source.
2. Effect of field winding connection:
When the field winding is connected and excited, it creates a magnetic field that interacts with the armature winding. This interaction induces a voltage in the armature winding, which contributes to the terminal voltage of the generator.
3. Open circuit terminal voltage:
When the field winding is not connected, the generator is in an open circuit condition. In this state, the only voltage present across the terminals is the residual magnetism voltage. This residual magnetism voltage is typically very low, resulting in an open circuit terminal voltage of 12V.
4. Incorrect connection of field winding:
In this scenario, when the field winding is connected, the terminal voltage drops to zero. This indicates that there is a problem with the connection of the field winding. The most likely explanation is that the field winding has been incorrectly connected, resulting in a short circuit or a wrong polarity connection.
5. Consequences of incorrect field winding connection:
When the field winding is incorrectly connected, it can cause a short circuit or a reverse polarity connection. This effectively bypasses the armature winding and prevents the generation of any voltage. As a result, the terminal voltage drops to zero.
Conclusion:
In a DC shunt generator, when the field winding is correctly connected and excited, it should increase the terminal voltage. However, if the terminal voltage drops to zero when the field winding is connected, it indicates that there is a problem with the connection of the field winding. In this case, the correct answer is option 'C' - "The field winding has got wrongly connected".
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A dc shunt generator when driven without connecting field winding shows an open circuit terminal voltage of 12V. When field winding is connected and excited, the terminal voltage drops to zero becausea)field resistance is higher than critical resistanceb)there is no residual magnetism in the field circuitc)field winding has got wrongly connectedd)there is a fault in armature circuitCorrect answer is option 'C'. Can you explain this answer?
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A dc shunt generator when driven without connecting field winding shows an open circuit terminal voltage of 12V. When field winding is connected and excited, the terminal voltage drops to zero becausea)field resistance is higher than critical resistanceb)there is no residual magnetism in the field circuitc)field winding has got wrongly connectedd)there is a fault in armature circuitCorrect answer is option 'C'. 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 dc shunt generator when driven without connecting field winding shows an open circuit terminal voltage of 12V. When field winding is connected and excited, the terminal voltage drops to zero becausea)field resistance is higher than critical resistanceb)there is no residual magnetism in the field circuitc)field winding has got wrongly connectedd)there is a fault in armature circuitCorrect answer is option 'C'. 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 dc shunt generator when driven without connecting field winding shows an open circuit terminal voltage of 12V. When field winding is connected and excited, the terminal voltage drops to zero becausea)field resistance is higher than critical resistanceb)there is no residual magnetism in the field circuitc)field winding has got wrongly connectedd)there is a fault in armature circuitCorrect answer is option 'C'. Can you explain this answer?.
A dc shunt generator when driven without connecting field winding shows an open circuit terminal voltage of 12V. When field winding is connected and excited, the terminal voltage drops to zero becausea)field resistance is higher than critical resistanceb)there is no residual magnetism in the field circuitc)field winding has got wrongly connectedd)there is a fault in armature circuitCorrect answer is option 'C'. 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 dc shunt generator when driven without connecting field winding shows an open circuit terminal voltage of 12V. When field winding is connected and excited, the terminal voltage drops to zero becausea)field resistance is higher than critical resistanceb)there is no residual magnetism in the field circuitc)field winding has got wrongly connectedd)there is a fault in armature circuitCorrect answer is option 'C'. 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 dc shunt generator when driven without connecting field winding shows an open circuit terminal voltage of 12V. When field winding is connected and excited, the terminal voltage drops to zero becausea)field resistance is higher than critical resistanceb)there is no residual magnetism in the field circuitc)field winding has got wrongly connectedd)there is a fault in armature circuitCorrect answer is option 'C'. Can you explain this answer?.
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