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Shane Macguire Grade: upto college level
        A wire of length 1 m and radius 0.1 mm has a resistance of 100 Ω. Find the resistivity of the material.
3 years ago

Answers : (1)

Aditi Chauhan
askIITians Faculty
396 Points
										Sol. ℓ = 1 m, r = 0.1 mm = 0.1 */ 10^–3 m

R = 100 Ω, f = ?
⇒ R = f ℓ / a
⇒ f = Ra/ℓ = 100 * 3.14 * 0.1 * 0.1 *10^-6/1
= 3.14 * 10^-6 = π * 10^-6 Ω-m.
3 years ago
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