# Voltage Current Resistance

It seems like the prefered analogy for voltage, current and resistance uses water with pressured tanks, hoses, etc. The waterfall analogy was the easiest for me to understand.

If we draw an analogy to a waterfall, the voltage would represent the height of the waterfall: the higher it is, the more potential energy the water has by virtue of its distance from the bottom of the falls, and the more energy it will possess as it hits the bottom. . . If we think about our waterfall example, the current would represent how much water was going over the edge of the falls each second. . . In the waterfall analogy, resistance would refer to any obstacles that slowed down the flow of water over the edge of the falls. Perhaps there are many rocks in the river before the edge, to slow the water down. Or maybe a dam is being used to hold back most of the water and let only a small amount of it through. . . if you think about our waterfall example: the higher the waterfall, the more water will want to rush through, but it can only do so to the extent that it is able to as a result of any opposing forces. If you tried to fit Niagara Falls through a garden hose, you’d only get so much water every second, no matter how high the falls, and no matter how much water was waiting to get through! And if you replace that hose with one that is of a larger diameter, you will get more water in the same amount of time. . . more on Voltage Current Resistance