The value of 220v AC is different from that of 220v DC.
The value of 220v AC is different from that of 220v DC. Ac 220V refers to the effective value of AC, and DC 220V refers to direct current with a constant voltage of 220V. The effective value of alternating current is determined by the thermal effect of the current, if a certain AC current through the resistor, after a cycle of heat generated, and a direct current through the same resistor, after the same time generated by the heat equal to each other, then the size of the direct current is the effective value of the alternating current