Question

the wire of a uniform cross sectoin area is cut into three equal segments. the resistivity p of segment will be​

Answer 1

Explanation:

R [ohm] = r [Ohm*m] * L [m] / S [mm2]

Where R: resistance

r: resistivity

L: length

S: section

So..

R = k * L

And you split 3 equal parts, L1 = L/3

So R1 = k *L/3

R // = R1 / 3

R// = k*L /9

You know R = k*L ( it's your cable before cut)

R// = R/9

Where

R: resistance before cut into 3 equal pieces

R//: Resistance of 3 peaces in parallel