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  2. Utility frequency - Wikipedia

    en.wikipedia.org/wiki/Utility_frequency

    The waveform of 230 V and 50 Hz compared with 120 V and 60 Hz. The utility frequency, (power) line frequency (American English) or mains frequency (British English) is the nominal frequency of the oscillations of alternating current (AC) in a wide area synchronous grid transmitted from a power station to the end-user.

  3. Refresh rate - Wikipedia

    en.wikipedia.org/wiki/Refresh_rate

    Another difference between 50 Hz and 60 Hz standards is the way motion pictures (film sources as opposed to video camera sources) are transferred or presented. 35 mm film is typically shot at 24 frames per second (fps). For PAL 50 Hz this allows film sources to be easily transferred by accelerating the film by 4%.

  4. Mains hum - Wikipedia

    en.wikipedia.org/wiki/Mains_hum

    Mains hum, electric hum, cycle hum, or power line hum is a sound associated with alternating current which is twice the frequency of the mains electricity.The fundamental frequency of this sound is usually double that of fundamental 50/60 Hz, i.e., 100/120 Hz, depending on the local power-line frequency.

  5. Mains electricity - Wikipedia

    en.wikipedia.org/wiki/Mains_electricity

    The voltage and frequency of electric power differs between regions. In much of the world, a voltage (nominally) of 230 volts and frequency of 50 Hz is used. In North America, the most common combination is 120 V and a frequency of 60 Hz. Other combinations exist, for example, 230 V at 60 Hz.

  6. Mains electricity by country - Wikipedia

    en.wikipedia.org/wiki/Mains_electricity_by_country

    60 Hz Andorra: C, F 230 V 400 V 50 Hz Angola: C, F 220 V 380 V 50 Hz Anguilla: A, B 110 V 120/208 V 127/220 V 240/415 V 60 Hz Antigua and Barbuda: A, B 230 V 400 V 60 Hz Argentina: C, I IRAM 2073 220 V [9] 380 V 50 Hz Line and neutral reversed compared to Chinese and Australian/NZ type I. Armenia: C, F 230 V 400 V 50 Hz Aruba

  7. The 10 Best 4K TVs That Guarantee a Great Viewing ... - AOL

    www.aol.com/10-best-4k-tvs-guarantee-131600386.html

    The QN90D also is also equipped with plenty of gaming-specific features such as a 120 Hz display and Motion Xcelerator to practically eliminate lag and blur. ... With only a 60Hz refresh rate and ...

  8. Flicker-free - Wikipedia

    en.wikipedia.org/wiki/Flicker-free

    Flicker-free is a term given to video displays, primarily cathode ray tubes, operating at a high refresh rate to reduce or eliminate the perception of screen flicker.For televisions, this involves operating at a 100 Hz or 120 Hz hertz field rate to eliminate flicker, compared to standard televisions that operate at 50 Hz (PAL, SÉCAM systems) or 60 Hz (), most simply done by displaying each ...

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    mail.aol.com

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