Question

derive roh formula
RA/L​

Answer 1

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.

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