**Prominent roles of capacitors in electronic circuits are charging and discharging.**To know capacitor's charging, practical explanation is needed.**Power source,capacitor and resistor are essential in this practice.**

One end of capacitor is connected to power source and other end is connected with resistor. **Settings of multimeter is changed to voltage measurements. Now power is turned on.** Voltage between the terminals of capacitor are noted by multimeter. It is noted that voltage on capacitor increases slowly because **resistor used here increasing the time taken for charging.**

After the particular time charge on capacitor will be approximately equal to voltage from power source.**To discharge capacitor, power source is replaced with a wire.** Now votage between terminals of capacitor is noted. **The voltage continously drops and finally it reaches zero voltage.**

The value of capacitors can be measured by **changing the settings in multimeter to capacitance mode.**If capacitors are connected **serially in a circuit , equivalent capacitance can be calculated as follows**

#### 1 /C_{eq} = 1 /C_{1} + 1 /C_{2} +· · · · · · + 1 /C_{n}

If capacitors are **connected parallel, equivalent capacitance of the circuit **is obtained by adding all capacitance of capacitors.

#### C_{eq} = C_{1} + C_{2} + · · · · · · + C_{n}

Variable capacitors ,super capacitors and electrolytic capacitors are the types of capacitors.