Question

Resistance of a metal wire of length 2m is 26 ohm. If the diameter of the wire is 0.3mm, what will be the resistivity of the metal wire?????
plz answer it fast to get 20 points.........​

Answer 1

resistivity of wire is 52

hope it help you

Answer 2

Answer:

${\bold{\red{\huge{Your\:Answer}}}}$

Explanation:

We can use the formula : $R=pL/A$ , where, R is resistance of the wire, L its length, A its cross-sectional area and \rho [rho] is the resistivity of the wire.

From the data given,

$R=$ ∩ , $L=2 m$  $and\:A=\pi [0.3X10^{-3}]^{2} m^{2}$

$A=9X10^{-8}\pi  m^{2}$

$p=RA/L=>p=26X9X10^{-8} \frac{\pi }{2}$

∴  $p=367.38X10^{-8}$  ∩m

$or\:p=3.674X10^{-6}$  ∩m