Physics Coursework Electrical Resistance of A Wire

Definition of opp acent: A strongs opposition to the full point of electric reliable. Formula for electric resistivity: Voltage (V) / Current (A) = resistance (?) For my natural philosophy course change state I am liberation to investigate how resistance changes when variant factors change. I volition immediately describe the four factors which acquire-to doe with resistance, and out of these four factors I will choose one that I will investigate. Factors which propel resistance: - The length of a electrify. - The thickness of a telegram. - The material that the wire is make from. - Temperature the wire is at. The longer the length of the wire the greater the resistance it has; duplicate the length of the wire will double its resistance. This is because the electrons have a longer journey to travel, and there is a higher(prenominal) demote of them colliding with atoms signification there is higher resistance. The thickness of the wire; the thicker the w ire the slight resistance it has. This is because the wire has a lot of area, since it has so much area the electrons have less chance of colliding with atoms thence less resistance. The material the wire is made from; some materials have to a greater extent lighten electrons than others, the more free electrons to carry the placard around the circuit the lower the resistance of the wire.

If you increase the temperature of a wire then you increase the resistance of the wire. At higher temperatures the atoms in the wire vibrate more aggressively meaning they obstruct the way of the electrons. A current is a flo w of charge, in metal wires the charge is ca! rried by free electrons. Metals have many a(prenominal) free electrons, which make them in effect(p) conductors of electricity. Resistance is the materials opposition to the flow of current meaning handle the atoms inside the... If you want to set a full essay, secern it on our website: BestEssayCheap.com

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