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Ф = 7,3×10⁵ Nm²/C
Como esta cargada uniformemente entonces
A = L² donde L = 15 cm = 15×10⁻² m
A = 225×10⁻⁴ m²
E = Ф/A
E = (7,3×10⁵ Nm²/C) / (225×10⁻⁴ m²)
N/C
ρ = Q/L
Q = ρL
E = k(ρL) / L²
ρ = E×L / k
ρ = ( (292/9)(10⁴)(15)(10⁻²) ) / (9)(10⁹)
ρ = 5,407×10⁻⁵ C/m
↑ Densidad lineal de carga de la varilla