A copper cable needs to carry a current of 200 A with a power loss of only 1.5 W/m.What is the required radius of the copper cable? (The resistivity of copper is 1.7 × 10−8 Ω⋅m. )
A) 4.0 cm
B) 0.21 cm
C) 0.85 cm
D) 1.2 cm
Correct Answer:
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