Ac Dc Electrical Theory

Dc is current that flows in one direction with a constant voltage polarity while ac is current that changes direction periodically along with its voltage polarity.

Ac dc electrical theory.

Dc is the kind of electricity made by a battery with definite positive and negative terminals or the kind of charge generated by rubbing certain types of materials against each other. However many of the devices which are used today operate only or more efficiently with dc. This exam will test your level of comprehension of the basic dc theory section of the electrical training course. Ac power and reactive.

Generating ac is that it can be transferred over long distances with fewer losses than dc. For example transistors electron tubes and certain electronic control devices require dc for. As useful and as easy to understand as dc is it is not the only kind of electricity in use. A magnetic field near a wire causes electrons to flow in a single direction along the wire because they are repelled by the negative side of a magnet and attracted toward the positive side.

This flow of electrical charge is referred to as electric current. Origins of ac and dc current. The handbook includes information on alternating current ac and direct current dc theory circuits motors and generators. What is the difference between ac and dc.

This is how dc power from a battery was born primarily attributed to thomas edison s work. There are two types of current direct current dc and alternating current ac. A battery consists of two or more chemical cells connected in series. The necessary fundamentals training to ensure a basic understanding of electrical theory terminology and application.

Ac generators gradually replaced edison s dc battery system because ac is safer to.