Answer :

Given

Resistivity (ρ) = 1.7 × 10-8 Ωm


Diameter (d) = 0.1 mm = 0.1×10-3 m


( 1m = 1000 mm)


Resistance(R) = 34 Ω


Area of cross section (A) =


A =


A =


Now







Hence the length of the wire is 15.7 m.


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