How are vibrations maintained in electrically maintainned tuning fork?

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TUNING FORK, ELECTRICALLY MAINTAINED (0620) ... For showing the effects of vibrations in a stretched cord and investigate the relationship between frequency, ... - Read more

... accurate in rate but otherwise arbitrary, derived through a synchronous motor from the vibrations of an electrically maintained tuning fork. - Read more

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How are vibrations maintained in electrically maintainned tuning fork? resources

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... Determination of the frequency of an electrically maintained tuning fork. Newton’s Rings – Determination of radius of curvature of a convex lens.

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Audio Oscillator - Physics · Kenyon College

Inside was an electrically maintained tuning fork, driven by a DC power supply in the 4.5 to 6 V range. Output impedances of 50, 500 and 5000 Ohms were available.

Coaxial magnetron having cavity walls vibrated by tuning fork

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Tuning Fork - YouTube

Rescued from being scrapped, Restored and now fully working again, this 50 Hz single phase electrically maintained Tuning Fork is a precision lab ...