theory of working of ac and dc current
Answers
DC stands for “Direct Current,” meaning voltage or current that maintains constant polarity or direction, respectively, over time. ... AC and DC motor design follows respective generator design principles very closely. A transformer is a pair of mutually-inductive coils used to convey AC power from one coil to the other.
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.
Working and Difference between AC and DC
the difference between AC and DC mainly includes the following-
Working and Difference between AC and DC
Alternating Current (AC)
Alternating current is defined as the flow of charge that changes direction periodically. The result obtained will be, the voltage level also reverses along with the current. Basically AC is used to deliver power to industries, houses, office buildings, etc.
Generation of AC
AC is produced by using called an alternator. It is designed to produce alternating current.Inside of a magnetic field, a loop of wire is spun, from which induced current will flow along the wire. Here the rotation of the wire may come from any no of means i.e. from, a steam turbine, flowing water, a wind turbine and so on. This is because the wire spins and enters into different magnetic polarity periodically, the current and voltage alternates in the wire.
From this, the generated current can be of many waveforms like sine, square and triangle. But in most of the cases sine wave is preferred because it is easy to generate and calculations can be done with ease.
