An ac generator provides emf to a resistive load in a remote factory over a two-cable transmission line. At the factory a step-down transformer reduces the voltage from its (rms) transmission value Vt to a much lower value that is safe and convenient for use in the factory. The transmission line resistance is 0.30 Ω/cable, and the power of the generator is 250 kW. If Vt = 80 kV, what are (a) the voltage decrease ΔV along the transmission line and (b) the rate Pd at which energy is dissipated in the line as thermal energy? If Vt = 8.0 kV, what are (c) ΔV and (d) Pd? If Vt = 0.80 kV, what are (e) ΔV and (f) Pd?
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