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Why is ac preferred over dc for distributing electrical energy?
AIt produces no heat in the wires
BIt can be stored easily in capacitors
CIts voltage is easily changed by transformers
DIt travels faster than dc in a wire
Answer & Solution
Correct answer: C. Its voltage is easily changed by transformers
Transformers work only with changing flux, so ac voltage can be stepped up or down efficiently, which makes long-distance transmission economical.
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