Im curious about varied power consumption for different devices - say household stuff - a cell phone charger and a toaster oven for example.
all household devices run on the same voltage/frequency (120v/60hz where I am)
however different devices "draw" different amounts of current (the cell phone charger less then the toaster).
ive read that the current draw is related to the resistance of the device. more resistance draws more current.
im confused about this dynamic though.
if the voltage and frequency are static 120v/60hz - and the speed of propagation is constant (is it?) then shouldnt a constant amount of current flow?
the amplitude(voltage) of the wave is constant, and the frequency/wavelength is constant - so how does more or less energy get transferred?
... i have been reading about wave propagation and i dont know if im mixing up different fields of physics btw...
-two ducks