Two Conductors Are Made from the Same Material and Are $\pi$

question 55

Multiple Choice

Two conductors are made from the same material and are of the same length but one has a circular cross sectional area with diameter 1.2 mm and the other is square with 0.6 mm on each side.What is the ratio R_circular/R_square of their resistances?

• A)R_circular/R_square = 2
• B)R_circular/R_square = 1/\(\pi\)
• C)R_circular/R_square = \(\pi\)/2
• D)R_circular/R_square = 4
• E)R_circular/R_square = 1/2

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