resistance=Length*resisitivity*numberWires/Area
for resitance per meter..
resistance/meter=reisiitivity*numberwires/Area
You are given resisitivty, numberwires, Area is given (convert to square meter , ie 1.1e-3cm^2*1e-4 or 1.1e-7 m^2
Go solve.
a cabel consists of 10 strands of copper wire each of cross-section area 1.1x10^-3 cm^2. Calculate (a) the resistance per meter of the cable (b) the minimum number of strands which would be required if the resistance per meter is not to exceed 0.010ohms. (resistivity of copper = 1.8 x 10^-8 ohm meter.)
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