Question

the resistance of a wire of length 80cm and of uniform area of cross-section 0.025cmsq., is found to be 1.50 ohm. Calculate specific resistance of wire in SI units, Help please

Answer 1

`Specific\ resistance\ =resistivity\\ From\ formula\ on \ resistance:\ R= (pL)/(A)\ p-resistivity,\ L-length,\\ A-area\ of\ cross\ section\\ p= (R*A)/(L)= (1,5Ohm*0,025*10^(-4)m^2 )/(80* 10^(-2)m )=0,0003515625 Ohm*m`