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Proximity of dielectric
Proximity of dielectric
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Old 7th October 2008, 11:16 AM   #1
Colescuttle is offline Colescuttle  United States
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Default Proximity of dielectric

Does a dielectric need to be touching a conductor to exchange a charge with it? Or just close?

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Old 7th October 2008, 01:04 PM   #2
Conrad Hoffman is offline Conrad Hoffman  United States
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Pretty sure it doesn't. If you have two parallel plates and insert a dielectric between them, you'll see the capacitance increase.
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Old 7th October 2008, 02:22 PM   #3
jackinnj is offline jackinnj  United States
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Proximity of dielectric
except in a vacuum (as in a vacuum variable capacitor) it's always touching some nitrogen, oxygen, carbon dioxide, a few hydrogen and if you pass gas, some hydrogen sulfide molecules (as well as everything else in the food chain.)
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