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A 10-Mm Diameter Extension Cord Is Made of Metal Having a a Resistivity

Question 17

Multiple Choice

A 1.0-mm diameter extension cord is made of metal having a resistivity of 1.68 × 10-8 Ω ∙ m.When it carries a current of 15 A,what is the potential difference between two points in the cord that are 100 m apart?


A) 12 V
B) 23 V
C) 32 V
D) 41 V

Correct Answer:

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