Two cities are $150\, km$ apart. Electric power is sent from one city to another city through copper wires. The fall of potential per $km$ is $8\, V$ and the average resistance per $km$ is $0.5\, \Omega$. The power loss in the wire is
- A$19.2\, W$
- B$19.2\, kW$
- C$12.2\, kW$
- D$12.2\, W$
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