Capacitor can either be fixed or variable. Fixed capacitor has a definite capacitance value that cannot be changed or varied. Variable capacitors are those with multiple capacitance values.
Capacitors come in different types and styles to meet the needs of the electronics industry. Electrolytic capacitors are the most common types of capacitors used in electronics. It is polarized and must be connected to the circuit properly. Other types of capacitors are mica, mylar, ceramic, air, polyester etc.
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