Q. Where are DC regulated power supply used?

Answer

Computers require certain power supply in order to operate. With a continuous turn of a knob, the voltage output of a variable power supply can be adjusted to meet specific demands. They typically come in voltages between 5 and 30 volts and amperage levels between 0.5 and 10 amps. Every single electronic item that runs off of a battery uses direct current. Battery-operated electronics like laptops and mobile phones typically have an AC converter built in to help charge their batteries from alternating current. Direct current is not ideal for high-voltage electricity transmission because adjusting its voltage is more complex and costly than adjusting the voltage of alternating current.