Question

DETTAVior or capacitor Umur • Charging • Initially, the capacitor behaves like a wire N JEG • After a long time, the capacitor behaves like an open switchs HES • Discharging • Initially, the capacitor behaves like a battery nEE5 + JEG EⓇ • After a long time, the capacitor behaves like an open switch 3

I want to know the behavior of a capacitor which is connected to a battery and a resistor after time t=0. The only thing is that the capacitor carries an INITIAL CHARGE of some columns. will the capacitor act as a wire or battery. please explain well.

Answer 1

As you say in the circuit there will be the only battery, resistor, and capacitor at time t=0. Then as we close the switch of the circuit, the capacitor starts to charge i.e. current flows and the potential difference across the capacitor starts to rise. Then after a long time when the capacitor is fully charged it acts as an open switch.

As the circuit contain resistance it just increases the charging time of the capacitor. The higher the resistor the longer the time taken by the capacitor to charge.

As we know, Capacitors don't store the charge. In fact, the capacitor stores an imbalance of charge.

i.e.

Then the capacitor with INITIAL CHARGE of some columns will act as a small pseudo battery which discharges quickly.

Note: Capacitors don't store energy but supercapacitors can do.