Answer Posted / syed shoeb ullah hussaini

first let me tell you about
transformer .. Transformer
work when an alternating
current is given as input ..... So
in the case of dc drive we
need an transformer but we
are have dc as a input ... In this
case we give input to
transformer in pulsating
form ... Means we are give
voltage in the form of pulses
so that transformer will work
but if we give direct d.c then
transformer will burn ...

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