Voltage and current source in superposition theorem

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In the context of the superposition theorem, a voltage source is treated as a short circuit because it maintains a specified voltage regardless of current, effectively acting as a wire when set to zero voltage. Conversely, a current source is considered an open circuit since it delivers a specified current without regard to voltage, functioning as an insulator when set to zero current. This treatment is based on the ideal characteristics of these sources, rather than their internal resistance. The simplification allows for easier analysis of linear circuits by isolating the effects of individual sources. Understanding these principles is essential for applying the superposition theorem effectively in circuit analysis.
wilsonb
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why we take current source as a open and voltage source as a short in superposition theorem. is this is because of its internal resistance or any other reason exist?
 
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An ideal voltage source is something that will deliver that specified voltage no matter how much current is required. If you set that voltage spec to 0 (which you do to remove that voltage from the linear equation that depends on it) it is the same as a short circuit. A wire.

An ideal current source is something that will deliver that specified current no matter how much voltage is required. If you set that current spec to 0 (which you do to remove that current from the linear equation that depends on it) it is the same as an open circuit. An insulator.
 

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