Ac Dc Electrical Theory

The necessary fundamentals training to ensure a basic understanding of electrical theory terminology and application.

Ac dc electrical theory.

Ac power and reactive. This is how dc power from a battery was born primarily attributed to thomas edison s work. 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. 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.

There are two types of current direct current dc and alternating current ac. The handbook includes information on alternating current ac and direct current dc theory circuits motors and generators. However many of the devices which are used today operate only or more efficiently with dc. What is the difference between ac and dc.

Ac generators gradually replaced edison s dc battery system because ac is safer to. As useful and as easy to understand as dc is it is not the only kind of electricity in use. This flow of electrical charge is referred to as electric current. This exam will test your level of comprehension of the basic dc theory section of the electrical training course.

Origins of ac and dc current. Generating ac is that it can be transferred over long distances with fewer losses than dc. 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. Alternating current vs direct current.

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.