I need i for a School Project, but I don’t quite understand when I search on google
In: Technology
As we know, positive charges repel other positive charges and attract negative charges. Negative charges likewise repel negative charges and attract positive charges.
Electronics tend to concern little with charges building up on objects, and this attraction/repulsion force beyond the interior of a wire. However, the electrons in one wire do put some force on the electrons in other nearby wires. The amount that they interact is the capacitance between the two.
A capacitor is designed so that the ‘wires’ are incredibly close together and have a lot of surface area almost in contact (but never actually in contact). This maximizes their capacitance.
Practically, what happens in a capacitor is that by adding some electrons to one side, electrons are much more content to leave the other side (due to the electrons in the first side repelling them). While electrons never actually cross the gap, it can seem as though they do since electrons flow in one side and out the other. This is, of course, not sustainable – it requires more and more voltage to move more and more electrons into that one side, but the higher the capacitance the more electrons can be moved before you need to raise the voltage.
Latest Answers