Question

A conducting wire of 50cm length and area of cross section 0.05mm2 has a resistance of 10Ω. Find its resistivity ​

Answer 1

Answer:

10^(-6) Ohm Metre

Explanation:

Roh=RA/L

Answer 2

Answer: ρ = 25 × 10⁻⁸ Ω⁻¹

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Explanation:

ρ = RA / L

↓    ↓ ↓   ↓

ρ = 10Ω × [0.05 × 10⁻⁶]m² × [50 × 10⁻²]m

ρ = 10 × 5 × 50 × 10⁻¹⁰

ρ = 2500 × 10⁻¹⁰

ρ = 25 × 10⁻⁸ Ω⁻¹