Question

Describe an experiment to study the factor on which the resistance of conductor wire depends

Answer 1

It depends on 4 Factors

LengthArea of cross sectionResistivity-can be changed by changing material.Temperature

Explanation:

When you consider one material for wire resistivity is fixed,because it depends on material property and concentration of electrons available for conductionResistance of wire depends on length ,directly and area ,inversely as you can see in the above formula.Resistance is depends on Temperature, for different categories of material viz+ve temp coefficient——R directly proportional to temperature.E.g.: Iron,copper.-ve temp coefficient——R inversely proportional to temperature.E.g.: semiconductors0 temp coefficient——R does not change with increase in temperature.E.g.: constantan,Manganin.