- #1
Brandon Hawi
- 8
- 1
Homework Statement
A high voltage powerline operates at a 500000 V-rms and carries an rms current of 500 A. If the resistance of the cable is 0.05Ω/km, what is the resistive power loss in 200 km of the powerline.
V = 500000 V-rms
Irms = 500 A
R/x = 0.05Ω/km
x = 200 km
Homework Equations
P = I2R
P = V2/R
P = IV
The Attempt at a Solution
I attempted to use V2/R at first, and that gave me 2.5 x 1010 Watts, however the given answer is 2.5 x 106 Watts. I get that answer when I use I2R, but I was wondering why V2/R could not be used?
EDIT: Fixed to V2/R
Last edited: