Answer / mubeen

DC system is expensive and have less quantity of voltage
than Ac system.Ac system consuming less power than DC
system.AC power can be easily reduce or increase (step up /
step down ) by the transformers.But for DC required so many
equipment to increase the voltage flow.

Answer / prem

that may not right, initially any where or any place the induced voltages are AC only, in order to analyse the things
we show by AC

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