If you sweep one pole of a magnet quickly past an electrical conductor (at a right angle to it), a voltage will be momentarily "induced" in the conductor. There's reciprocity in the interaction between electron flow and magnetism. This is the opposition to the flow of an electric current. Power in a circuit can be worked out using the simple relationship: There are several ways of defining voltage the correct physics definition is energy per unit charge, in other words, how big a job of work each lump of charge can do. Potential difference is often referred to as voltage. Current circuit electric is measured in ampères, or amps (A). When there is a flow of 1 coulomb per second, a current of 1 amp is flowing. This is far too small to be any use, so we consider electricity to flow in packets called coulombs. Each electron carries a charge of 1.6 × 10-19 coulombs.
There are four basic electrical quantities that we need to know:Ĭurrent is a flow of charge.
If a steady DC current is run through the coil, you would have an electromagnet - a device with the properties of a conventional magnet, except you can turn it on or off by placing a switch in the circuit. In electronics and electrical technology, a coil is usually known as an inductor. The highest flux density occurs when the conductor is formed into a coil having many turns. When an electric circuit flows through a conductor, a magnetic field (or "flux") develops around the conductor.
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Dynamic electricity, which consists of the permanent circulation of electric charges through a conductor.Ĭontinue deepening in these and many more concepts with our more than 20 books of electricity in PDF format, available in this section for immediate download.Basic electricity is described in many ways. There are two types of electricity: static electricity, which is obtained from friction between two or more objects. In other words, it is the force resulting from the attraction and repulsion of positive and negative charges. But, in its general definition, it is the phenomena that result from electric charges, their interaction and their movements. In physics, electricity is the branch that studies electrical phenomena. Today, we already have LED lighting that is much more efficient and generates much less heat. In fact, Thomas Edison was the first to make an electric light bulb work in a more durable and safer way, because before him others had already managed to light it. From then on, industrial societies, which had already begun to develop with the invention of the steam engine and the railroad, would begin to develop even further.
With the creation of the incandescent electric light (1879), Thomas Edison marked a before and after in the world.
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The electricity books we have compiled for our community of readers contain basic notions, manuals and guides for electricians or students of any profession related to electricity, including engineering, physics and technology. Who could conceive their life today without electricity? Can you imagine that two centuries ago electricity did not exist in the eyes of the world? Our collection of electricity books in PDF format is made for those who are passionate about this trade, for whom it is much more than a means to perform their daily activities.
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