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Find out how the thickness of a wire affects the resistance.
Member rating: No Rating | Words: | Submitted: Mon Feb 16 2004
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Title Electrical Resistance The aim of this investigation is to find out how the thickness of a wire affects the resistance. Background Knowledge Structure of a metal: A metal consists of a huge structure of atoms, which have released their electrons from their outer shell to form a 'sea' of electrons. Releasing the electrons causes the atoms to become positively charged ions. This leaves the metal atoms surrounded by a 'cloud of electrons'. A metal item is like one big atom with many nucleii but only one electron cloud. Instead of the atoms having their own electrons, the outer electrons of each metal atom leave the individual atoms and create a sea of free electrons throughout the metal. This allows the outer electrons of each atom to move freely as they orbit among all the atoms as a whole. The sea of electrons is there merely to hold the ions together, however if a...
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