In the water flow analogy sometimes used to explain electric circuits by comparing them to water-filled pipes, voltage difference is likened to water pressure difference.
The relationship between voltage and current (in ohmic devices) is defined by Ohm's Law.
Read more about this topic: Volt
Famous quotes containing the words water, flow and/or analogy:
“The night was thick and hazy
When the “Piccadilly Daisy”
Carried down the crew and captain in the sea;
And I think the water downed ‘em;
For they never, never found ‘em,
And I know they didn’t come ashore with me.”
—Charles Edward Carryl (1841–1920)
“Learning and teaching should not stand on opposite banks and just watch the river flow by; instead, they should embark together on a journey down the water. Through an active, reciprocal exchange, teaching can strengthen learning how to learn.”
—Loris Malaguzzi (1920–1994)
“The whole of natural theology ... resolves itself into one simple, though somewhat ambiguous proposition, That the cause or causes of order in the universe probably bear some remote analogy to human intelligence.”
—David Hume (1711–1776)