Answer / g .senthilkumaran

It is always better to give DC supply to the field then
only we can get continuous output i.e sine wave from the
stator of an alternator.

Answer / hansraj

the dynamical induced emf needs a constant flux i.e time
invarient flux
if we give the ac input it produces alternating flux in the
rotar field and dc current not producec e.m.f. is induced
so the
electrical power will be zero

Answer / veeru

the dynamical induced emf needs a constant flux i.e time
invarient flux
if we give the ac input it produces alternating flux in the
rotar field and then there is no emf is induced so the
electrical power will be zero

why used in starter in tube ligtht circuit.

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