Calculate the electric field strength required to just support a water drop of mass 10^-17kg and have charge 1.6×10^-19

Calculate the electric field strength required to just support a water drop of mass 10^-7 and have charge 1.6×10^-19c 

  ANS==> we know that 

           The farce due to electric field = weight of water drop 

             E =mg/q

             E=10^-7×9.8 /1.6×10^-19

             E=6.125×10^12 N/S

            Ans:- E=6.125×10^12N\S

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