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[" 70.An oil drop carrying charge 'Q' is...

[" 70.An oil drop carrying charge 'Q' is held in "=8],[" equilibrium by a potential difference of 600"],[" between the horizontal plates.In order to hold "],[" another drop of twice the radius in equilibrium "],[" a potential drop of "1600" V had to be maintained."],[" The charge on the second drop is "],[qquad 3Q]

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