Given,
ρ=1.78×10-8 Ωm
L = 1000m
A=0.07mm2
RAC = 1.5 RDC
RAC = ?
R= ρLA.R= 1.78×10-8×10000.07×10-6
R = 254.25 Ω
RAC 1.5 x 254.25 = 381.42 Ω (Ans)
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