directvoltage
Direct voltage, commonly called direct current voltage or DC voltage, is a voltage whose magnitude remains essentially constant in time and whose current flows predominantly in one direction. In ideal terms, the instantaneous voltage v(t) equals a fixed value V. Real DC may show small ripple or drift, but the direction of current does not reverse.
DC is contrasted with alternating voltage (AC), where voltage varies cyclically and the direction of current
Common sources include chemical cells and batteries (such as alkaline, lithium-ion, and lead-acid), DC power supplies
Voltage and polarity are measured with a voltmeter or multimeter in DC mode. Key quantities include the
Applications span electronics (logic circuits, batteries, sensors, and communication equipment), DC motors and actuators, and processes
Safety considerations include the potential for sustained electrical shock and the ability of DC circuitry to