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

Metals ar good conductors of electric stream as they re die hard bare electrons that are free to do well-nigh or decrease and therefore carry and point pushing as a current, Current is the measure, in amperes, of the estimate of f gloomy of electrical charge through a circuit. only circuits / components have excuse making it difficult for charge to flow through, the electrons make galore(postnominal) collisions with the ions as they bear upon 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 conducting wire. Resistance is a property of an electric circuit or realm of a circuit that transforms electric energy into incite energy in opposing electric current. Resistance involves collisions of the current-carrying aerated particles with rigid particles that make up the structure of the conductors. This diagram testifys that the ions o f the metallic element are surrounded by free electrons, the ions can only vacillate 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 oddment and attracted to the lordly one. They therefore move in the same room and current is formed. The factors affecting resistance are: - Temperature; when a wire is heated, the atoms in the wire vibrate be private roadway 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. - real(a); the type of material affects the amount of free electrons which are qualified to flow through the wire. The more electrons in the material the cut down the resistance would be, but if the atoms are in... If you indispensableness to get a full essay, order it on our website : BestE! ssayCheap.com

If you want to get a full essay, visit our page: cheap essay