Two wires are both made out of copper (resistivity p) and have the same length L

Question

Two wires are both made out of copper (resistivity p) and have the same length L One wire has a radius[MaPdE 2r while the second wire has a radius of r. All answers should be in terms of p, r, and L as needed! The resistivity of wire 1 is... How does the resistivity of wire 1 compare to the resistivity of wire 2? The resistivity of wire 1 is greater than the resistivity of wire 2. The resistivity of wire 1 is the same as the resistivity of wire 2. The resistivity of wire 1 is less than the resistivity of wire 2. It is impossible to tell from the information given. The resistivity of wire 2 is. The resistance of wire 1 is. The resistance of wire 2 is.

Explanation / Answer

a) resistivity does not depends on the size it depends only on temperature

so both wire has same resistivity

b) same resistivity that of wire 1

D) R = RHO*L/A = RHO*L/4pir^2

e) R = rho*l/A = rho*l/pir^2

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