DC (direct current).
This is known as a direct current or DC. The two major types of currents are AC (alternating current) and DC (direct current). In AC the charges move back and forth, but in DC the charges flow in JUST ONE DIRECTION. Due to this characteristic it will not reverse direction like AC can.
Direct current is constant - always in the same direction. Alternating current regularly changes direction; for example, in household current, 50 or 60 times (that is, full cycles) in every second.See the Related Link below for more information about the difference between alternating current and direct current.
An electric current is a movement of charges, and it is measured in amperes or just amps. An ammeter is used to make this measurement. Current flow is a scalar quantity, and it refers to the number of charges passing a given point per unit of time.
A direct current involves change of flow in a single direction. DC (direct current), at least on the macro scale. On the atomic scale, they seem to wander all over the place between atoms, and the average movement is what we measure as current.
A diode is a semiconductor electrical component that allows an electric current in only one direction. A tunnel diode, or Esaki diode, is a special type of diode that can operate very quickly using quantum tunneling, allowing it to work even with microwave frequencies (current switching direction billions of times per second).
alternating current (ac)
AC current (alternating current) like in a wall outlet
Alternating current changes polarity 50 0r 60 times a second depending on the country you are in.
One has, in that event, a direct current,typically represented by the symbol DC .
Direct current does not reverse direction
A direct current involves change of flow in a single direction.
oppositional currents
That is called "DC" or "direct current".
That is DC - direct current.
Simple
Revision
There are two parts to acceleration: direction and speed. When either of these aspects are changed, then acceleration changes.