Question

The resistance of a wire having a length of 0.6 and diameter 0.4 mm is 1.5 Ω. Find the resistivity of its material.​

Answer 1

Answer:

Resistance = 3 Ohm

length = 1.2m

diameter = 0.4mm=0.4×10−3

Resistivity = ?

R = APl

 R=πd2ρl

R = resistance ,P= resistivity , l = length d = diameter

3=π×0.4×10−3×0.4×10−3ρ×1.5×4ρ=63×π×0.4×0.4×10−6ρ=8π×10−8Ωm

Explanation:

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