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View Full Version : Walter Lewin Makes a Battery out of Cans and Water


Aaron
09-20-2007, 06:25 AM
The best physics lecturer Walter Lewin makes another wonderful physics demonstration after having read a lecture on batteries.

The battery he creates has a huge potential difference - 10 to 20 kV!

You'll never believe what it's made of!
It's made of two cans with bottom and top open and two other cans. And then water is let to drip through the two open ones.

After a short period a spark comes up, then another one, then another one.

Do you know how it works? If not, see the free electricity and magnetism video course by Walter Lewin at MIT's OCW!

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I don't know about the claims of Walter Lewin being the best physics lecturer or not. Several years back, my friend drew me the exact diagram of what this vid shows but this is the first time I actually saw a working demo. Very interesting!

Youtube: YouTube - Walter Lewin Makes a Battery out of Cans and Water (http://www.youtube.com/watch?v=oY1eyLEo8_A)

Walter Lewin Makes a Battery out of Cans and Water - Free Science Videos and Lectures (http://www.freesciencelectures.com/video/walter-lewin-makes-a-battery-out-of-cans-and-water/)

Aaron
09-20-2007, 06:35 AM
Below is the explanation but don't read yet in case you wanted to figure it out based on at least one explanation that may be correct.































RMCybernetics - Experiments - Kelvins Thunderstorm (http://rmcybernetics.com/projects/experiments/experiments_kelvins_thunderstorm_electrostatics.ht m)