Capacitance?

Question

know how to caculate capacitance in parallel and series, but I'm not sure I truly understand exactly what capacitance IS. I know that a capacitator stores electricity until a certin point, then releases it all at once. But why do we want that? How is it useful besides making sirens?

I also know that a numberline is formed with resistance as the positive values, zero as perfect conductance and capacitance as the negitive numbers. Does that mean that capacitance is a kind of anti-resistance? Is a circut with just a capacitor somehow have negitive resistance?

Answer 1

Capacitance is the ability of an electrical component to store charge.

some of its uses is to smoothen curent : when AC(Alternatinc Current) is converted into DC(Direct Current) it flows in bits on of on of but inorder for a circuit to have smooth constant and stable flow of current capacitors are used to store charge.
as you see in the capacitance formula you will notice time taken (usually in miliseconds or even micro seconds). this is to be able to estimate the charge contained with time taken to hold that time. it's formular is usualy to get the reactance,
XL = 2*pi*f*L. XL
capacitance is not an anti resistance the negative is because of the ability to store charge.
got by

Answer 2

Yes a capacitor is basically an energy storer. Here is a great example of a capacitor. You know those paddles that you get shocked with to restart your heart? Those are basically Capicitors.
Capacitance is not anti-resistance. It is just the word we give to some electronic device that can build and store energy that will be released.