# Really stuck

1. May 12, 2005

### DB

-A transmission line has a resistance of 5 ohms. Calculate the power loss in the line when 10 000 kW are transmitted at 10 kV...

I don't know where to start, what formula am I supposed to use? I'm sure the second I find out its gonna be soo easy, but any help would be apreciated.

2. May 12, 2005

### Andrew Mason

Use:

$$P = VI = I^2R$$ where V is the voltage drop over the transmission line and I is the current it conducts, and R is the resistance of the line.
What is the current if the 10 kV line is conducting 10,000 kW (that is just P = VI)?

AM