Question

Resistance of a metal of length 5m is 100 ohm. If the area of cross-section of the wire is 3×10^-7 m^2,calculate the resistivity of the metal

Answer 1

resistance= R =100 ohms

resistivity =r =?

length = L =5m

area =A =

$3 \times {10}^{ - 7} {m}^{2}$

R=r L\A

r=RA\L

r=100× 3 ×10^-7 \5

r=0.00914495