2. (10pt) A conductor made of nickel ( p. = 6.8×10 N-m) has a rectangular cross section 5 x 2mm and is 5 m long. Determine the total resistance of this conductor. Calculate the diameter of a5m long copper wire that has a circular cross section that yields the same total resistance. For theсopper,the resistivity Pe is 1.7 × 10-8 N-m.

Fig: 1