How does the resistance of a metallic wire depend on its temperature ?

How does the resistance of a wire depend on its length ?

How does the resistance of a wire depend upon its radius ?

Specific resistance of a wire depends on its

Specific resistance of a wire depends on its

Specific resistance of a wire depends on its

How does the resistance of a conductor depend on its length?

How does the refractive index of a medium depend on its temperature ?

How does the resistance (R) of a wire depend upon its radius (r)?

(a) How does the resistance of a pure metal change if its temperature decreases? (b) How does the presence of impurities in a metal affect its resistance?