# Difference between voltage and voltage drop?

by VenaCava
Tags: difference, voltage
No you are wrong. You cannot use V=12000V for calculating power loss $P_{loss}$ in line. You have use the voltage drop across the line to find $P_{loss}$.
Since we don't know that, (It is equal to difference between voltage at supply end ($V_{s}$) and voltage at load end (12000V). Since we dont know $V_{s}$, but we know current through the line, we can find power lost directly from the relation