Question

Resistance of a conductor depends upon.

Answer 1

Resistance:

1. The ability of a conductor that opposes the free flow of electric current or electrons is called resistance. The ratio of the voltage applied to the electric current flowing through it is also represented as resistance.
2. A conductor's resistance is determined by a number of parameters, including its length, material composition, and cross-sectional area. The resistance of conductor material is inversely proportional to the area of cross-section and directly proportional to the conductor length i.e. $\mathrm{R}\propto \frac{\mathrm{l}}{\mathrm{A}}$or $\mathrm{R}=\mathrm{\rho }\frac{\mathrm{l}}{\mathrm{A}}$ where rho is resistivity.
3. Electrical resistivity or electrical resistance is a characteristic that determines how well a substance resists electric current.
4. It also depends upon temperature, as temperature increases the resistance also increases i.e. $\mathrm{R}\propto \mathrm{T}$
5. A conductor has a very low resistance, whereas insulators have very high resistance.
6. Resistor are instruments in an electrical circuit that provides a specific value of resistance.

Therefore, the Resistance of a conductor depends upon the temperature, length, area, and nature of the material.