Potential diffrence between 2 plates?

Suppose there is 40000V at 1 plate(static), a neutral plate is by its side facing it. Now the potential difference between the side facing it and the plate itself is 80000v isnt it?(assume charge induced to be 40000v) as the induced charge in the neutral plate is -40000v...so take the difference of the 2 and we have 80000v

consider both the plates of the same dimension.

Answer:
If by neutral plate you mean having no charge on it, then we would cal it 0V. I don't know where you're gettng that -40,000V is induced in the second, the potential difference between the two is 40,000.

You are correct.

The process is for the "neutral plate" to be connected to a grounding wire while it is moved into position by the static plate. Then the ground wire is removed. The newly charged plate may then be removed and the process repeated.

Though I believe in reverse entropy, energy is conserved in this situation. The energy in extra charge comes from the seemingly minuscule amount of mechanical energy it took to separate them.

*In response to therealchuckbales :

http://www.physicsclassroom.com/mmedia/e...

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Potential diffrence between 2 plates?

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