Question

Визначте питомий опір матеріалу дротини завдовжки 450 м і перерізом 5 мм2, якщо її опір дорівнює 2,5 Ом. З якого матеріалу виготовлена дротина?

Answer 1

Ответ:

R=pl/S

p=RS/l

p=2.5*5*10⁻⁶/450=0.0278*10⁻⁶

це алюміній

Answer 2

Calculation of Resistance:

To determine the resistivity of the wire, we can use Ohm's Law, which states that the resistance (R) of a conductor is equal to the resistivity (ρ) multiplied by the length (L) of the conductor divided by its cross-sectional area (A). Mathematically, this can be expressed as:

R = ρ * (L / A)

Given that the length of the wire (L) is 450 m, the cross-sectional area (A) is 5 mm², and the resistance (R) is 2.5 Ω, we can rearrange the formula to solve for the resistivity (ρ):

ρ = (R * A) / L

Substituting the given values into the equation, we get:

ρ = (2.5 Ω * 5 mm²) / 450 m

Now, let's calculate the resistivity of the wire.