A Copper Cable Needs to Carry a Current of 200 $\Omega$

question 37

Multiple Choice

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} $\Omega$ m.)

• A) 4.0 cm
• B) 0.21 cm
• C) 0.85 cm
• D) 1.2 cm

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