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Superconductivity

Superconductivity

INTRODUCTION
     We've all heard about superconductivity. But, do we all know what it is?
How it works and what are its uses? To start talking about superconductivity, we
must try to understand the how "normal" conductivity works. This will make it
much easier to understand how the "super" part functions. In the following
paragraphs, I will explain how superconductivity works, some of the current
problems and some examples of its uses.

CONDUCTIVITY
     Conductivity is the ability of a substance to carry electricity. Some
substances like copper, aluminium, silver and gold do it very well. They are
called conductors. Others conduct electricity partially and they are called
semi-conductors. The concept of electric transmission is very simple to
understand. The wire that conducts the electric current is made of atoms which
have equal numbers of protons and electrons making the atoms electrically
neutral. If this balance is disturbed by gain or loss of electrons, the atoms
will become electrically charged and are called ions. Electrons occupy energy
states. Each level requires a certain amount of energy. For an electron to move
to a higher level, it will require the right amount of energy. Electrons can
move between different levels and between different materials but to do that,
they require the right

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Word Count: 1551

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