Question

Two cities are `150 km` apart. Electric power is sent from one city to another city through copper wire. The fall of km is `0.5 Omega`. The power less in the wire is
A. `19.2 kW`
B. `19.2 J`
C. `12.2 kW`
D. `19.2 W`

Answer 1

Correct Answer - A
Loss of power per km =`(V^2)/R = (8^2)/(0.5) = 128W`
For `150km = 150 xx 128 = 19200W`
`=19.2 kW`.