Question

Formula of resistance when radius is r and length is l

Answer 1

Answer:

Formula of resistance when radius is r and length is l :-

R = (ρ × l) / A   ( A = π r²)

where R = resistance of the conductor.

           ρ = resistivity of the conductor.

           l = length of the conductor.

           A = cross sectional area of the conductor.

The ratio of the potential difference to the current is called the electric resistance R of the conductor. Very high resistances are measured in mega-ohm and very low resistance in micro-ohm.