discuss AC current and DC current ?
Answers
Explanation:
In direct current (DC), the electric charge (current) only flows in one direction. Electric charge in alternating current (AC), on the other hand, changes direction periodically. The voltage in AC circuits also periodically reverses because the current changes direction.
Answer:
Alternating Current (AC)
Alternating current describes the flow of charge that changes direction periodically. As a result, the voltage level also reverses along with the current. AC is used to deliver power to houses, office buildings, etc.
Generating AC
AC can be produced using a device called an alternator. This device is a special type of electrical generator designed to produce alternating current.
A loop of wire is spun inside of a magnetic field, which induces a current along the wire. The rotation of the wire can come from any number of means: a wind turbine, a steam turbine, flowing water, and so on. Because the wire spins and enters a different magnetic polarity periodically, the voltage and current alternates on the wire. Here is a short animation showing this principle:Direct Current (DC)
Direct current is a bit easier to understand than alternating current. Rather than oscillating back and forth, DC provides a constant voltage or current.
Generating DC
DC can be generated in a number of ways:
An AC generator equipped with a device called a "commutator" can produce direct current
Use of a device called a "rectifier" that converts AC to DC
Batteries provide DC, which is generated from a chemical reaction inside of the battery
Using our water analogy again, DC is similar to a tank of water with a hose at the end.