Question

Explain the factor on which the resistance of a conducting wire depends

Answer 1

Resistance of a conductor depends on 4 things:

1. Length of the conductor : Direct proportion
2. Cross sectional area of the conductor or thickness of the conductor : inverse proportion
3. Temperature
4. Nature of material of conductor

Hope this helps. There is no explanation for the last two as they affect the resistivity which eventually affects the resistance.

$r = \gamma \frac{l}{a}$

Length and area of cross section affect the no. of atoms or ions that collide with the flowing electrons hence increasing or decreasing resistance to flow of current resp.

Answer 2

Answer:

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