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  2. National Grid (India) - Wikipedia

    en.wikipedia.org/wiki/National_Grid_(India)

    India's grid is connected as a wide area synchronous grid nominally running at 50 Hz. The permissible range of the frequency band is 49.5-50.5 Hz, effective 17 September 2012. The Union Government regulates grid frequency by requiring States to pay more when they draw power at low frequencies. [3]

  3. Mains electricity by country - Wikipedia

    en.wikipedia.org/wiki/Mains_electricity_by_country

    50 Hz Nigeria: D, G 230 V 400 V 50 Hz Niue: I AS/NZS 3112 230 V 400 V 50 Hz North Korea: A, C, F 110 V 220 V 380 V 60 Hz 50 Hz North Macedonia: C, F 230 V 400 V 50 Hz Norway: C F NEK EN 50075 NEK 502 230 V 230 V 400 V 50 Hz 230 V on IT grid, and 400 V on TN grid. Oman: G 240 V 415 V 50 Hz Pakistan: C, D, G, M 230 V 400 V

  4. 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.

  5. 576i - Wikipedia

    en.wikipedia.org/wiki/576i

    SDTV resolution by nation: countries using 576i are in blue. 576i is a standard-definition digital video mode, [1] originally used for digitizing 625 line analogue television in most countries of the world where the utility frequency for electric power distribution is 50 Hz.

  6. Orders of magnitude (frequency) - Wikipedia

    en.wikipedia.org/.../Orders_of_magnitude_(frequency)

    Acoustic – frequency of G −7, the lowest note sung by the singer with the deepest voice in the world, Tim Storms. His vocal cords vibrate 1 time every 5.29 seconds. 10 0: 1 hertz (Hz) 1 to 1.66 Hz: Approximate frequency of an adult human's resting heart beat: 1 Hz: 60 bpm, common tempo in music 2 Hz: 120 bpm, common tempo in music ~7.83 Hz

  7. Mains electricity - Wikipedia

    en.wikipedia.org/wiki/Mains_electricity

    A 50 Hz ±5 Hz vibrating-reed mains frequency meter for 220 V The world's first public electricity supply was a water wheel driven system constructed in the small English town of Godalming in 1881. It was an alternating current (AC) system using a Siemens alternator supplying power for both street lights and consumers at two voltages, 250 V for ...

  8. Explainer-Is India changing its name to Bharat? G20 invite ...

    www.aol.com/news/explainer-india-changing-name...

    Invites sent by Indian President Droupadi Murmu calling herself "President of Bharat" for a dinner on the sidelines of the G20 summit have stirred speculation that the government may be about to ...

  9. 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.