Circuit Connections in Capacitors - In a circuit, a Capacitor can be connected in series or in parallel fashion. If a set of capacitors were connected in a circuit, the type of capacitor connection deals with the voltage and current values in that network.
When you connect power supply to the capacitor it blocks the DC current due to insulating layer, and allow a voltage to be present across the plates in the form of electrical charge. So, you know how a capacitor works and what are its uses or application, but you have to learn that how to use a capacitor in electronic circuits.
When a capacitor is connected to DC supply, then the capacitor starts charging slowly. And, when the charging current voltage of a capacitor is equal to the supply voltage it’s said to fully charged condition. Here, in this condition the capacitor works as an energy source as long as voltage is applied.
Charging is when the voltage across the plates builds up quickly to equal the voltage source. Once a capacitor reaches its fully charged state, the current flow stops. Once a charged capacitor is disconnected from a circuit it will remain charged. To discharge a capacitor, it will need to be placed in a closed circuit without a voltage source.
With series connected resistors, the sum of all the voltage drops across the series circuit will be equal to the applied voltage VS ( Kirchhoff’s Voltage Law ) and this is also true about capacitors in series. With series connected capacitors, the capacitive reactance of the capacitor acts as an impedance due to the frequency of the supply.
The energy required to charge a capacitor is supplied by the external source. The behaviour of a capacitor in DC circuit can be understood from the following points − When a DC voltage is applied across an uncharged capacitor, the capacitor is quickly (not instantaneously) charged to the applied voltage.