Question

Сопротивление алюминиевого провода длиной 1,8 км и сечением 12 мм^2 равно 2,5 Ом. Определите его удельное сопротивление. Ответ округлите до тысячных, запишите только число. Срочно надо!

Answer 1

ro=RS/l

ro=2,5 Ом*12*10^-6 м²/1800 м=1,667*10^(-8) Ом*м

Answer 2

Calculation of Specific Resistance

To determine the specific resistance of the aluminum wire, we can use the formula:

Specific Resistance (ρ) = Resistance (R) / (Length (L) * Cross-sectional Area (A))

Given: - Length (L) = 1.8 km = 1800 m - Cross-sectional Area (A) = 12 mm^2 = 12 * 10^-6 m^2 - Resistance (R) = 2.5 Ω

Using the given values, we can calculate the specific resistance as follows:

ρ = R / (L * A)

ρ = 2.5 Ω / (1800 m * 12 * 10^-6 m^2)

Calculating this expression will give us the specific resistance of the aluminum wire.