Two Wires with the Same Resistance Have the Same Diameter

question 17

Multiple Choice

Two wires with the same resistance have the same diameter but different lengths.If wire 1 has length L₁ and wire 2 has length L₂,how do L₁ and L₂ compare if wire 1 is made from copper and wire 2 is made from aluminum? The resistivity of copper is 1.7 x 10^-5 W·m and the resistivity of aluminum is 2.82 x 10^-5 W·m.

• A)L₁ = 1.7 L₂
• B)L₁ = 0.60 L₂
• C)L₁ = 2.8 L₂
• D)L₁ = 0.36 L₂

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