In fact, ideal model for a voltage source models a practical voltage source accurately
only when the current delivered/absorbed by it is a small fraction of its short-circuit current.
Similarly, ideal model for a current source models a practical current source accurately only
when the voltage appearing across its terminals is a small fraction of its open-circuit voltage.
1.5.3 Ideal Short-circuit Element and Ideal Open-circuit Element
Ideal two-terminal short-circuit element is the element that is used to model a piece of con-
necting wire in Circuit Theory. It is also used to model an ideal switch in closed condition.
It has no resistance, no inductance ...
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