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A heavy bus bar is 20 cm long and of rectangular cross-section, 1.0 cm ˛ 2.0 cm. What is the voltage drop along its length when it carries 4000 A? (The resistivity of copper is 1.68 ˛-8 Wœm.)

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A heavy bus bar is 20 cm long and of rectangular cross-section, 1.0 cm ˛ 2.0 cm. What is the voltage drop along its length when it carries 4000 A? (The resistivity of copper is 1.68 ˛-8 Wœm.)






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