Question

derivation for R=rho l/A​

Answer 1

Answer:

Yeah I am Answering the question

Explanation:

Resistivity is the resistance per unit length and cross-sectional area. ... We know that R = ρ L / A. Thus we can derive the expression for resistivity from this formula. ρ = R A / L, where R is the resistance in ohms, A is the area of cross-section in square meters and L is the length in meters

Answer 2

hy mate

here is you answer

The formula for electrical resistance is -R=rho*l /A (i.e resistance is directly proportional to length(l) and inversely proportional to area(A). ... In the solution of the above stated question why is the formula given as-R is directly proportional to l^2 and inversely proportional to m (mass) used.

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