Number 10 Copper Wire (Radius = 1

question 12

Multiple Choice

Number 10 copper wire (radius = 1.7 mm) is commonly used for electrical installations in homes.What is the voltage drop in 41 m of #10 copper wire if it carries a current of 9 A? (The resistivity of copper is 1.7 × 10−⁸ Ω⋅m. )

• A) 0.7 V
• B) 0.8 V
• C) 3.7 V
• D) 0.5 V
• E) ​0.4 V

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