A practical voltage source consists of:a)A practical voltage source consists of:b)An ideal current source in parallel with an internal resistance.c)Both (A). and (b).d)None of the above.Correct answer is option 'B'. Can you explain this answer?

Question

Answer

An ideal current source is expected to have zero losses, but practically this is not possible. The internal loss of the current source is represented as an internal resistance ‘r’ placed in series with the current source. It is placed in parallel because current remains equal in series components and divides in parallel components.

Answer

Explanation:

Practical Voltage Source:
A practical voltage source is a device that provides a constant voltage output regardless of the load connected to it. In reality, no voltage source can be ideal, as there are always some limitations and imperfections.

Ideal Current Source:
An ideal current source is a device that provides a constant current output regardless of the load connected to it. It is an abstraction that assumes the current source has infinite capacity to supply current.

Internal Resistance:
The internal resistance of a practical voltage source is the resistance that is present within the source itself. It is an inherent property of the source and can be modeled as a resistor connected in series with the ideal voltage source.

Combining Ideal Current Source and Internal Resistance:
When an ideal current source is connected in parallel with an internal resistance, it forms a practical voltage source. The current source provides a constant current output, and the internal resistance limits the maximum current that can be sourced from the voltage source.

Reason for Option B:
Option B is the correct answer because a practical voltage source can be modeled as an ideal current source in parallel with an internal resistance. The ideal current source provides a constant current output, and the internal resistance limits the maximum current that can be sourced from the voltage source, resulting in a practical voltage output.

Conclusion:
A practical voltage source consists of an ideal current source in parallel with an internal resistance. This combination allows for a constant voltage output with limitations imposed by the internal resistance.

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