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# Capacitors

### Impedance of a capacitor – Capacitive reactance

The Impedance of a capacitor (Capacitive reactance) is the measure of the opposition to a change of the electrical current in this component.

### What is a Capacitor?

Capacitors are devices made of two metal plates separated by an insulator or dielectric. Charge, Voltage and Capacitance Relationship

### Dielectric constant / Relative Permittivity (Capacitor)

What is the Dielectric constant / Relative Permittivity? The dielectric constant is the ratio of the permittivity of a substance to the permittivity of free space. It is a dimensionless physical constant

### Capacitors in Series – Capacitors in Parallel

Capacitors in series – Capacitors in parallel. How to obtain the equivalent capacitance of series capacitors and parallel capacitors? Formulas and examples

### Electrolytic Capacitor

The Electrolytic Capacitor has been developed to achieve large capacities in small physical dimensions. To achieve this large capacity, a special dielectric is used.

### Capacitor Charging Process (RC circuit)

Capacitor charging process. Capacitor charging process shows the variation of voltage and current in the capacitor over time, when it is connected to a DC voltage source

### Capacitor and Direct Current (DC) – Dielectric

Capacitor and Direct Current. If a not charged capacitor is connected across the terminals of a battery, a transient current flows as the capacitor plates charge up.

### Capacitor Discharging Process (RC circuit)

Capacitor discharge process. In a series RC circuit, a capacitor voltage Vc decreases from the initial voltage on the capacitor to 0 volts in some amount of time.

### Capacitor and the Alternating Current

Capacitor and the Alternating Current. Unlike the behavior of a capacitor in direct current (DC), in the alternating current (AC) the current passes more easily through a capacitor.

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