AC voltage is highly efficient as compared to DC voltage. The impedance is the. Dc Motor Vs Ac Motor Difference Between Dc Motor And Ac Motor Electrical Engineering Books Electrical Projects Electrical Wiring Colours The frequency of AC is either 50Hz or 60Hz depending on location. . For a while AC was the dominant form of electricity but today we use DC every day especially in portable devices. The charging station converts the AC into DC outside the car and then sends it directly to the battery. What is the difference between AC and DC. In DC the electrons flow steadily in a single direction or forward In AC electrons keep switching. While the operating principle between the two remains the same there are important differences between ac and dc motors in construction. Lets take a look at a direct comparison of AC to DC. Because the electrons move at a. When we talk about alternating current we see that i