the electrical resistivity of silver is 1.60* 10 to the power -6 ohm meter .what wii be the resistance of a silver of length 10 m and cross sectional area 2 * 10 to the power -3.sq m?
we now that
R = Ïl / A
where
A = 2 x 10-3 m2
Ï = 1.6 x 10-6 Ω.m
l = 10 m
so,
R = (1.6 x 10-6 x 10 ) / 2 x 10-3
or
R = (0.8 x 10-5) / 10-3
so, the resistance of the wire is
R = 8 x 10-3 Ω