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Two Wires with the Same Resistance Have the Same Diameter Ω\Omega

Question 3

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 *10-5 Ω\Omega ·m and the resistivity of aluminum is 2.82 *10-5 Ω\Omega ·m.


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

Correct Answer:

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