Is there any electrostatic field around the leads of a charged capacitor? Let's take just the negative one. If I take a piece of tissue and put close to that terminal it will attract or repel the paper? And if not, why?
Just to add to the good reply by @kuruman -- The force would depend on the amount of charge on the tissue and the capacitance between the tissue and the lead. That capacitance depends on the areas of the tissue and the lead, and the separation between them.If I take a piece of tissue and put close to that terminal it will attract or repel the paper?
The two capacitor plates have the bulk of the electric field energy between them, yes, but the two leads outside the capacitor still have a small parasitic capacitance between them, and they have the same voltage Vc between them that the plates inside the capacitor have.Are you sure the inner field doesn't hold down all of e- and p+ force?
Then you will have a capacitor with a new capacitance that will depend on the size, shape and position of the foil. Capacitance is a quantity that depends only on the geometry of the two conductors.Uh, OK, I understand. But what if I connect that lead to a larger plate, an aluminum foil for example?
The Potential Difference between the terminals and between the plates is the same. The FIELD (Volts per metre) is a lot higher between the plates because the spacing is very small.Are you sure the inner field doesn't hold down all of e- and p+ force?