Number 10 Copper Wire (Radius = 1

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