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On 2021/Feb/21, at 21:06, Marx, David via Phys-l <email@example.com <mailto:firstname.lastname@example.org>> wrote:
The resistance of transmission lines causes power losses, P = I^2 R. With dc, most of the energy is lost over a short distance. With ac, you can increase the voltage and reduce the current via transformers, and transmit the power over much longer distances.