Ac Dc Electrical Theory

This flow of electrical charge is referred to as electric current.

Ac dc electrical theory.

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. However many of the devices which are used today operate only or more efficiently with dc. The necessary fundamentals training to ensure a basic understanding of electrical theory terminology and application. Ac power and reactive.

A battery consists of two or more chemical cells connected in series. Alternating current is the form in which electric power is delivered to businesses and residences and it is the form of electrical energy that consumers typically use when they plug kitchen. There are two types of current direct current dc and alternating current ac. 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.

Alternating current ac is an electric current which periodically reverses direction and changes its magnitude continuously with time in contrast to direct current dc which flows only in one direction. Origins of ac and dc current. For example transistors electron tubes and certain electronic control devices require dc for. Alternating current vs direct current.

As useful and as easy to understand as dc is it is not the only kind of electricity in use. Ac generators gradually replaced edison s dc battery system because ac is safer to. This exam will test your level of comprehension of the basic dc theory section of the electrical training course. The handbook includes information on alternating current ac and direct current dc theory circuits motors and generators.

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.