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geElectric charge is the physical property of matter that causes it to experience a force when placed in an electromagnetic field. There are two types of electric charges: positive and negative. Like charges repel and unlike attra

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Wikipedia's facts - electric charge

Electric charge is the physical property of matter that causes it to experience a force when placed in an electromagnetic field. There are two types of electric charges: positive and negative. Like charges repel and unlike attract. An object (one not made of antimatter) is negatively charged if it has an excess of electrons, and is otherwise positively charged or uncharged. The SI derived unit of electric charge is the coulomb (C). In electrical engineering, it is also common to use the ampere-hour (Ah), and, in chemistry, it is common to use the elementary charge (e) as a unit. The symbol Q often denotes charge. Early knowledge of how charged substances interact is now called classical electrodynamics, and is still accurate for problems that don't require consideration of quantum effects.

The electric charge is a fundamental conserved property of some subatomic particles, which determines their electromagnetic interaction. Electrically charged matter is influenced by, and produces, electromagnetic fields. The interaction between a moving charge and an electromagnetic field is the source of the electromagnetic force, which is one of the four fundamental forces (See also: magnetic field).

Źródło: https://en.wikipedia.org/wiki/Electric_charge


The risk of a professional electrician

Occupation electrician is very often seen as a profession in which extremely common ones are physical injury. This is related primarily to the fact that when working with electricity, even the smallest mistake can cause severe short circuit, which would be harmful to human health. Usually created a power failure is unexpected and electrician seeking a solution to the problem moves groping. Therefore, for such a mistake it is very easy and you can tell that no theoretical knowledge is not able to prepare the employee to perfect the profession, because of some random events can not be predicted.


Are electrical faults are inevitable?

Actually, modern technological solutions in the design and construction of electrical installations, make electrical services are becoming less necessary. Excellent insulation of cables and their arrangement can make the most electrical work will be the installation of such electrical lines, not during their operation. Does this mean that in the future, avoid any electrical failures? The answer to this question is simple and of course negative, because although more and better solutions are continuously implemented many failures simply impossible to predict, even using the most modern electrical installations.