Answer / pithavapurvish

In analog system the magnitude of voltage or current is very
with time continuously .and in digital system the out put is
very in two stets one or zero if output is one then the
magnitude is at high position and if zero then the magnitude
oh output is zero the output can not change with time it
change insteniously

How can we Run three phase motor when only single or two phase supply is available ??

3 Answers  

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) why transformer cannot rotate though the principle behind induction motor is similar to a transformer

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