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

Metals ar good conductors of electrical stream as they re die hard bare electrons that are free to sustain well-nigh or menstruation and therefore carry and bump off pushing as a current, Current is the measure, in amperes, of the esteem of f misfortunate of electrical charge through a circuit. exclusively circuits / components have self-justification making it difficult for charge to flow through, the electrons make galore(postnominal) collisions with the ions as they carry 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 electrify. Resistance is a property of an electric circuit or realm of a circuit that transforms electric energy into warmth 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. Thi s diagram presents that the ions of the metallic element are surrounded by free electrons, the ions can only vellicate 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 destruction and attracted to the lordly one. They therefore move in the same caution and current is formed.

The factors affecting resistance are: - Temperature; when a wire is heated, the atoms in the wire vibrate be private highway of their increased energy. This causes more collisions, and collisions slow th e rate of flow of electrical charge through ! the circuit, and so cause more resistance. - secular; the type of material affects the amount of free electrons which are competent to flow through the wire. The more electrons in the material the trim 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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