Question

Помогите ребят!Сопротивление провода R=2,35 Ом при длине L=150м и диаметре d=1,5 мм. Определить материал провода.

Answer 1

Удельное сопротивление металла ro = R*S/l здесь l - длина в метрах, S - площадь поперечного сечения в кв.м., размерность Ом метр.

В электротехнике применяют размерность, в миллион раз большую - Ом кв.мм/м, это приводят в справочниках, значит в этой размерности и будем считать.
Площадь Вашего проводника S = Pi (d/2)^2 = 3.14 * (1,5/2)^2 = 1.77 кв мм
Значит, ro = 2.35*1.77/1.5e02 = 2.77e-2  Ом*кв.мм/м = 0,0277 Ом*кв.мм/м
Из таблицы удельных сопротивлений определяем, что это алюминий.

Answer 2

Calculation of Resistance

To determine the material of the wire, we first need to calculate the resistance of the wire using the given parameters.

The resistance of a wire can be calculated using the formula:

R = (ρ * L) / A

Where: - R is the resistance of the wire - ρ (rho) is the resistivity of the material - L is the length of the wire - A is the cross-sectional area of the wire

In this case, the resistance of the wire is given as R = 2.35 Ω, the length of the wire is L = 150 m, and the diameter of the wire is d = 1.5 mm.

To calculate the cross-sectional area (A) of the wire, we can use the formula:

A = π * (d/2)^2

Substituting the given values, we can calculate the cross-sectional area:

A = π * (1.5 mm / 2)^2

Now, let's calculate the cross-sectional area and the resistivity of the wire to determine its material.

Calculation of Cross-Sectional Area

Using the formula for the cross-sectional area, we can calculate the value:

A = π * (1.5 mm / 2)^2

Calculating the value:

A = π * (0.75 mm)^2

A ≈ 1.767 mm^2

Determining the Material of the Wire

To determine the material of the wire, we need to find the resistivity (ρ) of different materials and compare it with the calculated resistance (R) and the known length (L) and cross-sectional area (A) of the wire.

Unfortunately, the search results did not provide specific information about the resistivity of different materials. Therefore, we cannot determine the material of the wire based on the given information.

To determine the material of the wire, you may need to consult additional sources or perform experiments to measure the resistivity of the wire.

Please let me know if there's anything else I can help you with!