Electrical Engineering (EE) Exam > Electrical Engineering (EE) Questions > In the analysis of short transmission lines, ...
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In the analysis of short transmission lines, which of the following is neglected?
- a)I2R loss
- b)Shunt capacitance
- c)Series impedance
- d)All of the above
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
In the analysis of short transmission lines, which of the following is...
The transmission lines which have length less than 50 km are generally referred as short transmission lines.
For short length, the shunt capacitance of this type of line is neglected and other parameters like electrical resistance and inductance are lumped
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In the analysis of short transmission lines, which of the following is...
Shunt capacitance is neglected in the analysis of short transmission lines
Short transmission lines are typically a few kilometers in length, and the voltage and current along the line do not vary significantly over this distance. When analyzing short transmission lines, certain parameters can be neglected to simplify calculations. One of the parameters that is often neglected is shunt capacitance.
Reasons why shunt capacitance is neglected in the analysis of short transmission lines:
- Low impact on line behavior: In short transmission lines, the shunt capacitance typically has a minimal effect on the overall line behavior. Since the line length is short, the capacitive reactance is relatively low compared to other parameters such as series impedance.
- Negligible charging current: The shunt capacitance of a short transmission line results in a small charging current, which can be disregarded in many cases. This simplifies the analysis of the line and allows for easier calculations.
- Focus on dominant parameters: In the analysis of short transmission lines, the focus is often on the dominant parameters such as series impedance and resistance, which have a more significant impact on line performance. By neglecting the shunt capacitance, engineers can streamline their calculations and still achieve accurate results.
Overall, while shunt capacitance is an important parameter in long transmission lines and high-frequency applications, it can be neglected in the analysis of short transmission lines due to its minimal impact on line behavior and the focus on more dominant parameters.
Short transmission lines are typically a few kilometers in length, and the voltage and current along the line do not vary significantly over this distance. When analyzing short transmission lines, certain parameters can be neglected to simplify calculations. One of the parameters that is often neglected is shunt capacitance.
Reasons why shunt capacitance is neglected in the analysis of short transmission lines:
- Low impact on line behavior: In short transmission lines, the shunt capacitance typically has a minimal effect on the overall line behavior. Since the line length is short, the capacitive reactance is relatively low compared to other parameters such as series impedance.
- Negligible charging current: The shunt capacitance of a short transmission line results in a small charging current, which can be disregarded in many cases. This simplifies the analysis of the line and allows for easier calculations.
- Focus on dominant parameters: In the analysis of short transmission lines, the focus is often on the dominant parameters such as series impedance and resistance, which have a more significant impact on line performance. By neglecting the shunt capacitance, engineers can streamline their calculations and still achieve accurate results.
Overall, while shunt capacitance is an important parameter in long transmission lines and high-frequency applications, it can be neglected in the analysis of short transmission lines due to its minimal impact on line behavior and the focus on more dominant parameters.
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