Suppose Instead of Using a 12-Gauge (Diameter = 2 $\rho$ (Cu)= 17

question 67

Multiple Choice

Suppose instead of using a 12-gauge (diameter = 2.05 mm) solid copper cable you made a hollow copper cable of outer diameter 2.59 mm (10-gauge) and inner diameter 1.29 mm (16-gauge) .Calculate the length of hollow cable that would give the same resistance as 1 m of 12-gauge solid cable.Use $\rho$ (Cu) = 1.7 $\times$ 10^-8 $\Omega$ /m.

• A)0.402 m
• B)2.48 m
• C)0.833 m
• D)1.44 m
• E)1.20 m

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