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State any four advantages of A. C. over D. C . 

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Advantages of AC over DC: i) It is possible to use a transformer. ii) Distribution efficiency is high. iii) Generation is easy and economical. iv) Construction of ac equipment/ machines is robust and simple. v) Installation is less costly. vi) AC switchgears are simple in construction and operation. vii) AC system is economical than DC system. viii) AC system is safer than DC system.

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