# Voltage and current source in superposition theorem

by wilsonb
Tags: current, source, superposition, theorem, voltage
 P: 28 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?
 P: 2,265 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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