Do capacitors have a charge limit?

The charges that accumulate on the plates of a capacitor are not provided by the material of the plates themselves but by the source that is charging them, so there is in principle no limit to the amount of charge that they can hold, if your source is strong enough.

Why does a capacitor lose its charge over time?

As the capacitor charges, the voltage at its terminals increases, and because it opposes the applied voltage therefore the charging current decreases until it stops.

Why does the current in the circuit go to 0 when the capacitor is fully charged?

When a capacitor is fully charged, no current flows in the circuit. This is because the potential difference across the capacitor is equal to the voltage source. (i.e), the charging current drops to zero, such that capacitor voltage = source voltage.

Can a capacitor store infinite charge?

If by charges you mean electric charges, then no, a capacitor does not store charges.

Why do capacitors charge exponentially?

The slower rise in voltage causes a further slowing in the rate of charge movement which further slows down the rise in voltage which causes an even slower rate of charge movement which… It is like a chicken and egg circular mechanism which results in an exponential response.

How long should a capacitor hold its charge?

A big capacitor may hold a charge for some time, but I don’t think you will ever get much further than 1 day in ideal circumstances. You should watch out if you have turned on the PC just ‘a moment ago’, but if you let it unplugged for a couple of hours and it will be fine.

How long does it take to fully charge a capacitor?

The time required for the capacitor to be fully charge is equivalent to about 5 time constants or 5T. Thus, the transient response or a series RC circuit is equivalent to 5 time constants.

Does it take longer to charge or discharge a capacitor?

Capacitor charge and discharge graphs are exponential curves. If a larger value of resistance were used with the same value of capacitance in the above circuit, then a smaller current would flow, therefore it would take longer for the capacitor to charge up and longer for it to discharge.

Does current stop when capacitor is fully charged?