Why DC isn't used in household electricity ?
Answers
Answer:
There are two important factors that determine the use of AC instead of DC:
1) Power: Power is defined by the voltage x current (V x I = W). This equation indicates that the higher the voltage, the lower the current, and that the lower the voltage, the greater the current, for the same power (consumption). If using a very high current, the thickness of larger diameter wire must, therefore more expensive. The transmission lines would be very expensive, so high voltages are used (thousands of volts) to transmit from the generating plants, with relatively thin wires.
2) Transformers: These work only with AC power (for induction), and are necessary to lower the voltage and current to raise the nominal levels used in homes.
Both factors are complementary, DC cables using low voltages, it would be too expensive (cable diameter should be large), as could not be used transformers.
In the case of using their own sources of energy such as solar, wind, chemistry, etc.. The use of AC would only be for reasons of standards, and this is solved by voltage inverters (DC to AC),
Explanation:
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