Consider Two Copper Wires with Circular Cross-Sections and Equal Lengths

question 24

Multiple Choice

Consider two copper wires with circular cross-sections and equal lengths.One wire has 3 times the diameter of the other.How do the resistances of these two wires compare?

• A)The thicker wire has 1/3 the resistance of the thinner wire.
• B)The thicker wire has 1/9 the resistance of the thinner wire.
• C)The thicker wire has 3 times the resistance of the thinner wire.
• D)The thicker wire has 9 times the resistance of the thinner wire.
• E)The thicker wire has times the resistance of the thinner wire.