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Alternating Current vs Direct Current

Q1:

Power companies supply ac, not dc, because:

A it is easier to transmit ac

B there is no longer a need for dc

C dc is more dangerous

D there are not enough batteries

ANS:A - it is easier to transmit ac

AC current transfer is more effective compared to DC current transfer over long distances due to step up and step down transformers which reduce I2R losses.



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