Resistance (R) depends on the resistivity (rho) of the material, the length (L) and cross section area (A)
of the wire as
R= rho * L/A.
use A= 1/4* pi* d^2= pi* r^2.
where r=d/2= radius of the copper wire.
find rho from your text book or internet.
then the eq can be written as-
R*A/ rho= L
of the wire as
R= rho * L/A.
use A= 1/4* pi* d^2= pi* r^2.
where r=d/2= radius of the copper wire.
find rho from your text book or internet.
then the eq can be written as-
R*A/ rho= L
-
shanky is correct