How do you imagine electricity? Please provide an example of visual representation for it!
When I was in High School, I remember that a fresh graduate of University in a field related to Electronics had asked me what electricity is and even more specific what current is and I answered him very fast and proudly a standard answer similar with this one found on Google: “a form of energy resulting from the existence of charged particles,, either statically as an accumulation of charge or dynamically as a current”. But it was just a memorized answer, anyway. After few years I graduated also such a university, and even now, after more than 8 years experience in electronics – related fields I am not sure I really understand it, or all of what’s behind this simple sentence. Anyhow, I remember a visual example from a teacher: imagine “charged particles” as being some tennis balls in a vertical and long plastic tube, all the balls being situated, as o result of the gravity, which is somehow voltage in our analogy, downside. If you rotate plastic tube 180 degrees, and this we imagine a reversed voltage, all balls will fall through the tube. If the gravity force is bigger (at North Pole) – so voltage is bigger, “attraction” = voltage will be bigger so balls speed will accelerate faster. The speed of the balls is lowered by friction forces, which are called resistance in electricity. Acceleration of the speed of balls can be seen as a coil = inductance. Speed of change of gravity force = voltage can be seen as capacitor = capacitance. One such a move of balls on a long tube can be seen as DC – continuous current. And if we rotate the ball tube constantly 1 time per second, it can be seen as AC – alternative current with one Herz frequency. And analogy can go further, but it could be too much. Anyhow, I am sure this isn’t the best analogy, so I am also keen too see better ones!