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A practical current source consists of
- a)An ideal current source in series with an impedance
- b)An ideal current source in parallel with an impedance
- c)An ideal current source with no impedance in series or in parallel
- d)An ideal current source with high impedance in series
Correct answer is option 'B'. Can you explain this answer?
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A practical current source consists ofa)An ideal current source in ser...
Understanding Practical Current Sources
A practical current source is designed to provide a stable output current, even when the load changes. The ideal current source can deliver a constant current regardless of voltage or load variations. However, real-world components come with limitations.
Why Option B is Correct
- An ideal current source in parallel with an impedance effectively simulates this behavior by allowing a certain amount of current to flow while maintaining voltage stability across the load.
- The impedance in parallel acts as a stabilizer, ensuring that the current source can still deliver a consistent current under varying load conditions.
Benefits of This Configuration
- Load Resistance Variation: When the load changes, the parallel impedance helps manage the output current, preventing drastic fluctuations.
- Voltage Control: The parallel impedance helps maintain a voltage across the load, which is essential for many applications.
Why Other Options Are Incorrect
- Option A: An ideal current source in series with an impedance would limit the current based on the impedance, making it less effective in delivering a consistent current.
- Option C: An ideal current source with no impedance would not account for real-world limitations, leading to unpredictable behavior.
- Option D: While an ideal current source with high impedance in series might seem feasible, it would still fail to maintain a consistent output current across varying loads.
Conclusion
In summary, a practical current source is best represented as an ideal current source in parallel with an impedance (Option B), ensuring stable current delivery while accommodating load variations. This configuration is crucial for reliable electrical circuit performance.
A practical current source is designed to provide a stable output current, even when the load changes. The ideal current source can deliver a constant current regardless of voltage or load variations. However, real-world components come with limitations.
Why Option B is Correct
- An ideal current source in parallel with an impedance effectively simulates this behavior by allowing a certain amount of current to flow while maintaining voltage stability across the load.
- The impedance in parallel acts as a stabilizer, ensuring that the current source can still deliver a consistent current under varying load conditions.
Benefits of This Configuration
- Load Resistance Variation: When the load changes, the parallel impedance helps manage the output current, preventing drastic fluctuations.
- Voltage Control: The parallel impedance helps maintain a voltage across the load, which is essential for many applications.
Why Other Options Are Incorrect
- Option A: An ideal current source in series with an impedance would limit the current based on the impedance, making it less effective in delivering a consistent current.
- Option C: An ideal current source with no impedance would not account for real-world limitations, leading to unpredictable behavior.
- Option D: While an ideal current source with high impedance in series might seem feasible, it would still fail to maintain a consistent output current across varying loads.
Conclusion
In summary, a practical current source is best represented as an ideal current source in parallel with an impedance (Option B), ensuring stable current delivery while accommodating load variations. This configuration is crucial for reliable electrical circuit performance.
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A practical current source consists ofa)An ideal current source in ser...
Ideal Voltage Source: An ideal voltage source has zero internal resistance.
Practical Voltage Source: A practical voltage source consists of an ideal voltage source (VS) in series with internal resistance (RS).
An ideal voltage source and a practical voltage source can be represented as shown in the figure.
Ideal Current Source: An ideal voltage source has infinite resistance. Infinite resistance is equivalent to zero conductance. So, an ideal current source has zero conductance.
Ideal Current Source: An ideal voltage source has infinite resistance. Infinite resistance is equivalent to zero conductance. So, an ideal current source has zero conductance.
Practical Current Source: A practical current source is equivalent to an ideal current source in parallel with a high resistance or low conductance.
Ideal and practical current sources are represented as shown the below figure.
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A practical current source consists ofa)An ideal current source in series with an impedanceb)An ideal current source in parallel with an impedancec)An ideal current source with no impedance in series or in paralleld)An ideal current source with high impedance in seriesCorrect answer is option 'B'. Can you explain this answer?
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