Question

Calculate the resistivity of the material of wire 1.0 m long 0.4 mm diameter and having a resistance of 2 ohm

Answer 1

Answer:

Explanation:

RESISTANCE = 2 OHMS.

LENGTH = 1 M

DIAMETER = 0.4 MM

                  = 0.4 *10^- 3 M

RADIUS = 0.2*10^-3 M

AREA = 3.14* 0.2*0.2*10^-6

         = 0.1256 *10^-6 M².

RESISTIVITY =?

RESISTANCE = RESISTIVITY * LENGTH/ AREA

       2             = RESISTIVITY * 1/0.1256*10^-6

       2             = RESISTIVITY *10^6/0.1256

RESISTIVITY = 2*0.1256*10^-6

RESISTIVITY = 0.2512 *10^-6

HOPE THIS HELPS.