What are DC and AC? Difference Between AC and DC Current Explained

Direct Current (DC) and Alternating Current (AC) refer to two fundamental types of electrical currents:

Direct Current (DC):

DC is a type of electrical current that flows in one direction only, maintaining a constant polarity (+ to - or - to +). It is characterized by a constant voltage and current magnitude over time.
DC power sources, like batteries and solar cells, provide a steady flow of electrons in a single direction. Common applications of DC include electronics such as smartphones, laptops, and most battery-powered devices.

Alternating Current (AC):

AC is a type of electrical current that reverses direction periodically, alternating between positive and negative polarities. It oscillates back and forth in a sinusoidal waveform. AC voltage and current continuously change in magnitude and direction over time, typically following a sine wave pattern. AC power is the standard for electrical distribution in homes and industries due to its ability to be transmitted over long distances more efficiently than DC. Power plants and generators usually produce electricity in the form of AC.