What is a Variable capacitor?

A variable capacitor is a type of capacitor whose capacitance can be adjusted by an external control. The capacitance is typically changed by altering the number of coil turns, the area of the plates, or the distance between them. The most common application of variable capacitors is in devices like radios and televisions, where they are used for tuning to specific frequency bands for reception or transmission. Variable capacitors come in a range of capacitance adjustment, from broad ranges to precise tuning, and are commonly used in analog circuits and high-frequency circuits. Some variable capacitors are manually adjustable, while others are automatically tuned depending on the application.

Application of Variable capacitor

１．Radio: Used for frequency tuning.
２．Television: Used for channel switching.
３．Wireless equipment: Helps in frequency adjustment and selection.

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