GCSE, Physics: What affects the resistance of a piece of wire?

Metals ar good conductors of galvanizing stream as they re die hard bare electrons that are free to excise well-nigh or carry and therefore carry and ravish pushing as a current, Current is the measure, in amperes, of the treasure of f miser open of electrical charge through a circuit. altogether circuits / components have apology making it difficult for charge to flow through, the electrons make galore(postnominal) collisions with the ions as they escape through the circuit, in places with low resistance, the electrons move more freely, as they make fewer collisions. apology is a measure of how hard it is to move electrons through a cable. Resistance is a property of an electric circuit or realm of a circuit that transforms electric energy into cacoethes energy in opposing electric current. Resistance involves collisions of the current-carrying supercharged particles with rigid particles that make up the structure of the conductors. This diagram points tha t the ions of the metallic element are surrounded by free electrons, the ions can only thrill about their fixed positions but they are free to move haphazardly from one ion to another. When a battery is attached, as show in the diagram, free electrons are repelled by the negative terminal figure and attracted to the lordly one. They therefore move in the same bearing and current is formed.

The factors affecting resistance are: - Temperature; when a wire is heated, the atoms in the wire vibrate be private avenue of their increased energy. This causes more collisions, and collisions slow the rate of flow of electrical charge through the circuit, and so cause more resistance. - b! odily; the type of material affects the amount of free electrons which are able to flow through the wire. The more electrons in the material the displace the resistance would be, but if the atoms are in... If you indispensableness to get a full essay, order it on our website: BestEssayCheap.com

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