Number 10 Copper Wire (Radius = 1

question 30

Multiple Choice

Number 10 copper wire (radius = 1.3 mm) is commonly used for electrical installations in homes.What is the voltage drop in 40 m of #10 copper wire if it carries a current of 10 A? (The resistivity of copper is 1.7 x 10^-8 W*m. )

• A)1.3 V
• B)0.77 V
• C)0.50 V
• D)0.13 V

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