Two wires A and B with circular cross-sections are made of the same metal and have equal lengths, but the resistance of wire A is three times greater than that of wire B.
1. What is the ratio of the cross-sectional area of A to that of B
a. 3
b.
c. 1
d.
e. 1/3
2. What is the ratio of the radius of A to that of B? choose from the same possibilities as in part 1.
