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GOWTHAM REDDY

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Harvesting electricity from gravity? Is it possible ?

Since I was kid I watched the world around me going through energy crisis. I was wondering if there was a possibility of producing electricity using "GRAVITY" of planet earth.
I was thinking maybe we could use earths magnetic field, and then placing a conductor and oscillating it. when the oscillations are happening there will be potential difference between two ends and E.M.F is induced.
Are there any other ways of using "GRAVITY" to produce electricity ?
If you have any explanations, Ideas or theoretical possibilities please comment below.

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    Nov 27 2012: Gravity from electricity itself is largely in the realm of perpetual motion (so, no).
    But as already stated, you could harness electricity through other situations effected by gravity such as Dams, and to a lesser extent, friction/motion based energy harnessing.

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