In an oil drop experiment, negatively charged droplets of equal mass (2.93x(10)^-15 kg) are studied as they fall through vacuum. An electric field of magnitude 5.92 x (10)^4 N/C
pointing downwards, is present. It is observed that a droplet of charge Q1 remains
suspended while another with charge Q2 falls through 0.125 m from rest in 0.25s.
The Q1/Q2 is closest to,
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