Question

Resistance of a metal wire of length 5 m is 100ohms. If the area cross-section of the wire is 3 × 10^-7 m^2, calculate the resistivity PLEASEEE ITS URGENT
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Answer 1

Answer:

Resistivity of the wire =  6 × 10^-6   Ohm.m

Explanation:

Given:

Resistance of the wire - R = 100 ohms

Length of the wire - L = 5 m

Cross-sectional area of wire - A = 3 × 10^-7  m²

Resistivity (ρ) of the wire is calculated as

ρ = (R × A) ÷ L    Ohm. m

∴ ρ = (100 × 3 × 10^-7) / 5

∴ ρ = 6 × 10^-6   Ohm.m

∴Resistivity of the wire =  6 × 10^-6   Ohm.m