Question

the resistance of a metal wire of length 1 metre is 26 ohm at 20 degree Celsius if the diameter of the wire is 0.3 mm what will be the resistivity of the metal at that temperature

Answer 1

L=1 meter

diameter = 0.3 mm

so radius = 0.3/2 = 0.15 mm = 0.15 multiply by 10^-3 m

R = 26

so resistivity = RA/L

R*pi*r^2/L

so = 26 * 3.14 * (0.15 * 10^-2)^2/ 1

ANSWER = 1.84 * 10^-8 M

HOPE IT HELPS BUDDY