Resistance of a Wire :: Papers

Resistance of a Wire Aim - I hope to uncovering out how opposite of a wire is affected. Prediction - I predict that as the length of the wire increases the apology allow for also increase. scientific Knowledge - ======================= A wire is a bundle of metal strips cover in plastic. The plastic can vary in colour and tie to different terminals These argon - ------------ Black = negative terminal Red = coercive terminal Blue = neutral terminal Green and yellow = basis terminal Brown = live terminal The material varies because it has free electrons, which argon able to flow through the wire. The number of the electrons depends on the amount of electrons in the outer energy shell of the atoms, so if there are more than than or larger atoms then there must be more electrons available. If the material has a high number of atoms there will be a high number of electrons causing a lower resistance because of the increase i n the number of electrons. Also if the atoms in the material are closely packed then the electrons will have more popular collisions and the resistance will increase. Resistance is measured in Ohms (). Ohms Law The right actually says that the resistance of a metal conductor is the same whatever the current - unless its getting hotter. However most people think of these equations when the law gets mentioned V = IR V is Voltage in Volts, I is present-day(prenominal) in Amps and R is resistance in Ohms. If the length of the wire is change magnitude then the resistance will also increase as the electrons will have a longer distance to travel and so more collisions will occur. Due to this the length increase should be proportional to the resistance increase. If the wires width is increased the resistance will decrease. This is because of the increase in the situation for the electrons to travel through.