Consider Two Copper Wires of Equal Cross-Sectional Area

question 176

Multiple Choice

Consider two copper wires of equal cross-sectional area.One wire has 3 times the length of the other.How do the resistivities of these two wires compare?

• A)Both wires have the same resistivity.
• B)The longer wire has 3 times the resistivity of the shorter wire.
• C)The longer wire has 9 times times the resistivity of the shorter wire.
• D)The longer wire has 27 times times the resistivity of the shorter wire.