Question

write three factors on which resistance of a wire depend write their mathematical relationship with resistance​

Answer 1

Answer:

thanks for the location of the

Answer 2

There is a famous formula

It depends on 4 Factors

Length

Area of cross section

Resistivity-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 conduction

Resistance 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.: semiconductors

0 temp coefficient——R does not change with increase in temperature.

E.g.: constantan,Manganin.