Ivestigation to show if constantan is a suitable replacement to copper wire

aceInvestigation to show if constantan is a suitable replacement for copper wire



Electricity is the flow of electrons within a circuit. In current electricity negative charges are made. Resistance is anything, which hinders the movement of these electrons. The definition of resistivity is the ability, measured in ohm metres, of a cubic metre of material to oppose the flow of an electric current. (Symbol rho-r).
Resistance occurs because of the particles in the material of the wire/conductor and how the material moves around them.

E.g.

Low resistance
In thicker wire the particles are a lot more spaced out so it is easier for the electric current to move around the particles-if the particles collided Ek is transferred to the particles causing an increases in heat.

High resistance
In thinner wire the particles are a lot closer together so that the movement of the current is hindered.

Other factors that may affect the resistance are;

· The physical dimension...