Re: What motor? [TANKS]

[Mike Lyons <mxlyons-at-cox.net>]

I = V / R
P = V^2 / R = I^2 R

Current is linearly proportional to voltage, so power is proportional to the square 
of voltage and of current.  For a fixed resistance, you can't change the 
relationship between voltage and current.

Power loss is linearly proportional to the resistance of the conductor (e.g. wire) 
and inversely proportional to the square of the voltage (or indirectly current if 
you like), hence the use of very high voltages in long-distance power transmission, 
as you indicated.



---- Clark Ward Jr <ki4gyt-at-gmail.com> wrote: 
...
Actually, Power is proportional to the square of current... I^2 x R = P
 which is why power companies use transformers to jack up the voltage to
tens of thousands of volts before sending it out over long distances to keep
from losing energy in the form of heat (power).  Raise voltage, current goes
down, => I^2R goes down => less heat (power wasted)
...