- #1

Angie K.

- 108

- 1

## Homework Statement

If 39.4 kW of power is to be transmitted from a generating station over two 0.141-Ω lines, estimate how much power is saved if the voltage is stepped up from 120 V(rms) to 1200 V(rms) and then down again, rather than simply transmitting at 120 V. Assume the transformers are each 95 percent efficient.

## Homework Equations

Power dissipated = I^2*R

## The Attempt at a Solution

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Would I find the current using Ohm's Law, of the 120 V and then of 1200 V ? Using .142 as the resistance?

The compare it to the given power?

Then I'm not sure what to do or even if that is the right approach.