Question

what are facfors which aftcet the resistance of material​

Answer 1

Answer:

Factor affecting the resistance of material:

1) Length of conductor:

The resistance of solid conductor is directly proportional to its length.

i.e R ∝ l

2) Area of cross section:

The resistance of solid conductor is inversely proportional to the the area of cross section.

i.e R ∝ 1/A

Thus, the thick conductor has minimum resistance but thin conductor has maximum resistance.

3) Temperature of conductor :

On increasing the temperature of metallic conductor its resistance also increases.

i.e temperature coefficient of resistance of matallic conductor is positive

Note: on increasing the temperature of semiconductor its resistance decreases.

4) Material of conductor:

Conductor of different material are kept at same temperature having equal length and having equal area of cross section but there resistance are different.

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