A variable capacitor is a capacitor whose capacitance may be intentionally and repeatedly changed mechanically or electronically. Variable capacitors are often used in L/C circuits to set the resonance frequency, e.g. to tune a radio (therefore they are sometimes called tuning capacitors), or as a variable reactance, e.g. for impedance matching in antenna tuners.
Read more about Variable Capacitor: Mechanically Controlled, Electronically Controlled, Transducers
Famous quotes containing the word variable:
“There is not so variable a thing in nature as a lady’s head-dress.”
—Joseph Addison (1672–1719)