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    Combining gravitational, viscous and electric forces

    What Combining gravitational, viscous and electric forces means in Physics A-Level, as defined for AQA.

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    When the droplet is held stationary, the electric force balances the weight, giving QV/d = mg, which rearranges to QV = mgd.
    AQA · Principle of Millikan’s determination of the electronic charge, e (A-level only) (study guide)

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