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  2. Electronic component - Wikipedia

    en.wikipedia.org/wiki/Electronic_component

    The strict physics definition treats passive components as ones that cannot supply energy themselves, whereas a battery would be seen as an active component since it truly acts as a source of energy. However, electronic engineers who perform circuit analysis use a more restrictive definition of passivity .

  3. Buzzer - Wikipedia

    en.wikipedia.org/wiki/Buzzer

    A buzzer or beeper is an audio signaling device, [1] which may be mechanical, electromechanical, or piezoelectric (piezo for short). Typical uses of buzzers and beepers include alarm devices , timers , train and confirmation of user input such as a mouse click or keystroke.

  4. Radio-frequency identification - Wikipedia

    en.wikipedia.org/wiki/Radio-frequency_identification

    A Passive Reader Active Tag (PRAT) system has a passive reader which only receives radio signals from active tags (battery operated, transmit only). The reception range of a PRAT system reader can be adjusted from 1–2,000 feet (0–600 m), allowing flexibility in applications such as asset protection and supervision.

  5. Powered speakers - Wikipedia

    en.wikipedia.org/wiki/Powered_speakers

    An active full-range loudspeaker. Powered speakers, also known as self-powered speakers and active speakers, are loudspeakers that have built-in amplifiers.Powered speakers are used in a range of settings, including in sound reinforcement systems (used at live music concerts), both for the main speakers facing the audience and the monitor speakers facing the performers; by DJs performing at ...

  6. Active investing vs. passive investing: What’s the difference?

    www.aol.com/finance/active-investing-vs-passive...

    Active and passive investing each have some positives and negatives, but the vast majority of investors are going to be best served by taking advantage of passive investing through an index fund.

  7. Security alarm - Wikipedia

    en.wikipedia.org/wiki/Security_alarm

    These active detectors transmit ultrasonic sound waves that are inaudible to humans using frequencies between 15 kHz and 75 kHz. The Doppler shift principle is the underlying method of operation which detects a change in frequency due to object motion. This detection occurs when the object must cause a change in the ultrasonic frequency to the ...

  8. Passive vs. Non-Passive Income: What's the Actual Difference?

    www.aol.com/finance/passive-vs-non-passive...

    The post Passive vs. Non-Passive Income: What's the Difference? appeared first on SmartReads by SmartAsset. The key to effective financial planning are two primary types of income: Passive and non ...

  9. What’s the Difference Between Active and Passive ... - AOL

    www.aol.com/difference-between-active-passive...

    Passive income sounds magical, but is it really better than active income? And what exactly is the difference between active and passive income? Discover: 6 Types of Retirement Income That Aren't...