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Appunti usato damerino competente circa: what is electricity, static electricity, applications of static electricity, conductors and insulators, semiconductors
Anteprima dell’appunto

What is electricity All matter is composed of microscopic particles called Atoms. Up to date the centre of each atom there is a Nucleus made up of Protons (positive electric charge) and Neutrons (neutral e.c.). They’re much heavier than Electrons, negative electric charges that spin around the nucleus, and they form most of the atom’s mass. The number of electrons attuale an atom is exactly equal ehi the number of protons. The p.e.c. of the protons is balanced by the n.e.c. of the electrons and the atom is electrically Neutral. Electrons orbit at different distances from the nucleus and the farthest electron can sometimes become detached Rompersi from the atom and change into Free Electrons. If an atom loses an electron it then has more protons than electrons and it’s called “Positive Ion”. If a free electron meets a neutral atom, it may go into the outer orbit around the nucleus. An atom usato this state is called “Negative Ion”. The movement through material of free electrons passing from atom ecco atom results as electric current.

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