Electrical engineers sometimes use a wire's conductance, G= sigma A / L, instead of its resistance. a. Write Ohm's law in terms of conductance, starting with "ΔV=". b. What is the conductance of a 5.4 -cm-long, 0.15-m m-diameter tungsten wire? c. A 1.5 A current flows through the wire of part b. What is the potential difference between the ends of the wire?