
An LC circuit, also called a resonant circuit, tank circuit, or tuned circuit, is an consisting of an , represented by the letter L, and a , represented by the letter C, connected together. The circuit can act as an electrical , an electrical analogue of a , storing energy oscillating at the circuit's . Animated diagram showing the operation of a tuned circuit (LC circuit). The capacitor C stores energy in its electric field E and the inductor L stores energy in its magnetic field B (green). [pdf]
Capacitors and inductors are important components in electronic circuits and each of them serve unique functions. Capacitors store energy in an electric field, while inductors store energy in a magnetic field. They have different applications and characteristics, such as energy storage, filtering, and impedance matching.
An inductor is also a basic circuit element that used to introduce inductance in an electrical or electronic circuit. The inductor has a property, known as inductance, which oppose any change in the electric current. The circuit symbol of a typical inductor is shown in the following figure.
We opt for inductors over capacitors because inductors hold energy within a field whereas capacitors store energy in a field. Depending on the circuit's needs, like energy storage, filtering or impedance matching an inductor might be a choice, than a capacitor. What is the difference between resistor capacitor and inductor?
An electric circuit element that has an ability of storing electrical energy in the form of electric field is called a capacitor. The property of the capacitor by virtue of which it store electrical energy is known as capacitance.
Inductance in an LC circuit is the measure of the magnitude of the inductor connected in the LC circuit. SI unit of inductance is Henry (H) and the inductance of LC circuit is represented by L. It is calculated as: What is Capacitor?
In terms of voltage-current relationship, if a two terminal circuit element whose terminal voltage is directly proportional to derivative of current with respect to time, then the element is called an inductor. Therefore, the mathematical relation between voltage current of an inductor is given by,

When the capacitance of a network whose capacitors are in series is considered, the reciprocal of the capacitances of all capacitors, is added to get the reciprocal of the total capacitance. To get this more clearly, 1CT=1C1+1C2+1C31CT=1C1+1C2+1C3 Following the same formula, if simply two capacitors are connected in. . The voltage across each capacitor depends upon the value of individual capacitances. Which means VC1=QTC1VC2=QTC2VC3=QTC3VC1=QTC1VC2=QTC2VC3=QTC3 The total voltage across the series capacitors circuit,. . The total amount of Current that flows through a set of Capacitors connected in series is the same at all the points. Therefore the capacitors. [pdf]
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.
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. Let us observe what happens, when few Capacitors are connected in Series.
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. Let us observe what happens, when few Capacitors are connected in Series. Let us consider three capacitors with different values, as shown in the figure below.
Capacitors that have both of their respective terminals connected to each terminal of another capacitor are said to be connected in Parallel. Parallel connected capacitors have a common supply voltage across them. Series connected capacitors have a common current flowing through them.
Capacitors can be arranged in two simple and common types of connections, known as series and parallel, for which we can easily calculate the total capacitance. These two basic combinations, series and parallel, can also be used as part of more complex connections.
When adding together Capacitors in Series, the reciprocal ( 1/C ) of the individual capacitors are all added together ( just like resistors in parallel ) instead of the capacitance’s themselves. Then the total value for capacitors in series equals the reciprocal of the sum of the reciprocals of the individual capacitances.

Electrolytic capacitors use a chemical feature of some special metals, earlier called "valve metals". Applying a positive voltage to the anode material in an electrolytic bath forms an insulating oxide layer with a thickness corresponding to the applied voltage. This oxide layer acts as the dielectric in an electrolytic capacitor. The properties of this aluminum oxide layer compared with tantalum pentoxide dielectric layer are given in the following table: [pdf]
A second aluminum foil, the so-called cathode foil, serves as a large-surfaced contact area for passing current to the oper-ating electrolyte. The anode of an aluminum electrolytic capacitor is an aluminum foil of extreme purity.
The cathode foil has a capacitance (Cc) that uses the oxide layer, which formed by the forming voltage or formed naturally during storage (generally 1V or less), as a dielectric. According to the construction of aluminum electrolytic capacitors, Ca and Cc are connected in a series.
In contrast to other capacitors, the counter electrode (the cathode) of alumi-num electrolytic capacitors is a conductive liquid, the operating electrolyte. A second aluminum foil, the so-called cathode foil, serves as a large-surfaced contact area for passing current to the oper-ating electrolyte.
A 0.05~0.11 mm thick anode foil and a 0.02~0.05 mm thick cathode foil are continuously etched electrochemically in a chloride solution with an AC or DC current. This enlarges the effective surface area of the aluminum foils to attain smaller capacitor sizes. The process develops aluminum oxide (Al203) to form a capacitor dielectric.
1. General Description of Aluminum Electrolytic Capacitors An aluminum electrolytic capacitor consists of cathode aluminum foil, capacitor paper (electrolytic paper), electrolyte, and an aluminum oxide film, which acts as the dielectric, formed on the anode foil surface.
The anode of an aluminum electrolytic capacitor is an aluminum foil of extreme purity. The effec-tive surface area of this foil is greatly enlarged (by a factor of up to 200) by electrochemical etch-ing in order to achieve the maximum possible capacitance values.
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