Question

a 5m long wire has diameter 0.4mm. if its resistance is 10 ohm, calculate its resistivity and conductivity. ​

Answer 1

Answer:

Given :   R=2Ω            l=1 m            d=0.4 mm =0.0004 m

Cross section area of wire       A=4πd2=4π×(0.0004)2=1.256×10−7 m2 

Resistivity of the material       ρ=lRA

∴   ρ=12×1.256×10−7=2.514×10−7  Ωm

Explanation:

your answer make me Brainliests answers pls