Question

Проволоку, имеющую по всей длине одинаковое сечение, разрезали на 5 равных частей, которые связали затем в плотный пучок. Сопротивление пучка оказалось равным 1 Ом. Какое было сопротивление проволоки до разрезания?

Answer 1

R=1 Ом   Ro=?

R=po*(L/5)/(5*S)=po*L/(25*S)=Ro/25     Ro=25*R=25*1=25 Ом

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Answer 2

Calculation of Resistance

To determine the resistance of the wire before it was cut, we can use the information provided. The wire was cut into 5 equal parts and then connected in a tight bundle. The resistance of the bundle was measured to be 1 Ohm.

Let's assume that the resistance of each individual wire segment is the same. We can then calculate the resistance of the original wire by multiplying the resistance of the bundle by the number of segments.

Let's denote the resistance of each wire segment as R. Since there are 5 segments, the resistance of the bundle is given by:

Resistance of bundle = 5R = 1 Ohm

To find the resistance of each wire segment, we can divide the resistance of the bundle by the number of segments:

R = (Resistance of bundle) / (Number of segments) = 1 Ohm / 5 = 0.2 Ohm

Therefore, the resistance of the wire before it was cut was 0.2 Ohm.