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What is an ideal voltage source and what is its input impedance?
An ideal voltage source provides no energy when it is loaded by an open circuit (i.e. an infinite impedance), but approaches infinite energy and current when the load resistance approaches zero (a short circuit). Such a theoretical device would have a zero ohm output impedance in series with the source.
Can voltage sources in series be added?
AC Voltage Sources in Series If the AC voltage sources connected in series are of different angular frequencies, it can be added together provided the current through the connected sources is the same.
Is the series connection of two ideal voltage sources equivalent to?
Thus, the series connection of two ideal voltage sources is equivalent to a single independent voltage source given by: Clearly, the obvious generalization to N voltage sources in series holds. In a previous example we determined the current i in the one-loop circuit shown below:
Is it possible to combine independent voltage sources in parallel?
We can use these facts to simplify voltage sources in series and current sources in parallel. It is not possible to combine independent voltage sources in parallel, since this would violate KVL. However, consider the series connection of two ideal voltage sources shown in (a) below:
Which is the ideal voltage between two nodes?
However, consider the series connection of two ideal voltage sources shown in (a) below: From KVL we know that v = v 1 + v 2 , and by the definition of an ideal voltage source, this must be the voltage between nodes a and b, regardless of what is connected to them.
How are dependent voltage sources similar to independent voltage sources?
Dependent voltage sources behave similar to the electrical sources we have looked at so far, both practical and ideal (independent) the difference this time is that a dependent voltage source can be controlled by an input current or voltage.