DC current and voltage magnitude. What is called an electric shock
The sequence works in the reverse order when power is removed, although speed is usually not as big a problem as switching. Thus, if the output tends to rise or fall, the feedback regulates the output power supply. However, in order to maintain a constant output under load, the power source must actually control the voltage under load. But the connections from the power source to its load have resistance, and the current flowing through them causes a voltage drop, which creates a voltage difference between the power output and the actual load.