page_title: Applications of capacitors
section_title: Tuned circuits
hierarchical_section_title: Applications of capacitors / Motor starters / Tuned circuits
caption_attribution_description: Deutsch: Einfach-Drehkondensator
context_page_description: Capacitors have many uses in electronic and electrical systems. They are so ubiquitous that it is rare that an electrical product does not include at least one for some purpose.
context_section_description: Capacitors and inductors are applied together in tuned circuits to select information in particular frequency bands.  For example, radio receivers rely on variable capacitors to tune the station frequency. Speakers use passive analog crossovers, and analog equalizers use capacitors to select different audio bands.
caption: Air gap tuning capacitor
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