Capacitance.

Capacitance is the resistance of a capacitor to alternating current. For direct current, the resistance of the capacitor is infinity, in reality the resistance of the leakage (dielectric).

The online calculator below allows you to find:
- Capacitance across frequency and capacitance;
- Frequency through capacitance capacitance;
- Capacitance through frequency and capacitance.

Capacitive resistance is the resistance that appears in electrical circuits containing capacitance. Capacitance is a physical quantity that characterizes the ability of an electrical circuit to store an electric charge.

When a capacitance is connected to a DC source, charges begin to build up on the capacitance's plates until the electric field between them becomes strong enough to counteract further charge buildup. In this case, a constant voltage is established in the circuit, equal to the source voltage.

When the capacitance is connected to an alternating current source, charges begin to accumulate and merge on the plates of the capacitance, depending on the direction of the current. This causes the alternating current in the capacitive circuit to be in phase with the voltage in the circuit.

Mathematically, this is expressed as X_C = 1/(2πfC), where X_C is the capacitance, f is the AC frequency, and C is the capacitance. Capacitance is measured in ohms.

Capacitive reactance affects electrical circuits containing capacitance and can change the amplitude and phase of the current and voltage in the circuit. This can lead to undesirable effects such as the generation of interference and noise in electrical devices.

One way to reduce the effect of capacitance in a circuit is to use compensating inductors. A compensating inductance is connected in series with the capacitance and creates a magnetic field that cancels out the electric field generated by the capacitance. Thus, the compensating inductance makes it possible to reduce the capacitance in the circuit and improve its electrical characteristics.

Capacitive reactance also plays an important role in electronic devices such as filters, sine wave generators, and broadband amplifiers. Filters use capacitance to suppress certain signal frequencies, while sine wave generators use capacitance to oscillate at a certain frequency.

In conclusion, capacitance is the resistance that appears in electrical circuits containing capacitance. Capacitance can change the amplitude and phase of current and voltage in a circuit and can be reduced by using compensating inductors. Capacitance is also used in various electronic devices such as filters and sine wave generators to suppress or create specific signal frequencies. Understanding capacitance and its effect on electrical circuits is essential to the design of efficient and reliable electronic devices.
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