A passive component is an electronic component that does not require a source of energy to perform its intended function. Examples of passive components include resistors, capacitors, and inductors. The classic crystal radio receiver, an AM radio receiver that does not require any electricity, is made entirely from passive components.

A passive filter is an electronic filter made entirely from passive components.

Compare to active component, an electronic device that requires a source of energy to perform its intended function.

Electronics terms | Electrical components

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