You can't there is no such thing as "free energy".
If a self-excited generator lost all its residual magnetism, can it build up an output voltage?
What can usually happen is the permanent magnets in the generator will become energized, and like static shocks, will store energy in them.
When two generators are to be run in parallel, one generator is first started and some load is given. Then second generator is brought in parallel with the running generator (subject few conditions, like voltage, frequency, phase angle). First generator which is running is known as running generator, the second generator which gets connected is known as incoming generator
If there is no residual magnetism in the field poles then there would be no flux too induce the initial voltage for self exitation
What is going to happen when you repeat this experiment on self D.C generator?
It is self excited generator, no external excitation circuit.
when the current is passing through the winding then it is called "Excitation". Types of excitation (1)seperately excited generator. (2)self excited generator. self generator is classified into 3 types. 1.shunt generator. 2.series generator. 3.compound generator. compoud generator is again classified into 2 types. 1.short shunt generator. 2.long shunt generator.
Yes, if the governor failed in a way that "makes it think" the generator is always running too fast it might prevent the generator from running at all.
self ducing
when the current is passing through the winding then it is called "Excitation". Types of excitation (1)seperately excited generator. (2)self excited generator. self generator is classified into 3 types. 1.shunt generator. 2.series generator. 3.compound generator. compoud generator is again classified into 2 types. 1.short shunt generator. 2.long shunt generator.
Running water can turn a turbine that runs a generator.
There are two types me dc generator 1 separately excited dc generator 2 self excited dc generator