The particle P shown has amass of 10mg and a charge `of -0.01mu C.`Each plate has a surface area
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Electerical force is blanced by the weight of the mass ` mg = qE E = elecrtric field ` or `mg = q. V. C / eplision _0 A` (:. Eplision_0 A / d = C :. 1 / d = C / eplision_0 A)` V = mg eplision_0 A / q.C ` `= 10^(-6) xx 9.8 xx 8.88 xx 10^(-12) xx 100 xx 10^(-4) / 10 xx 10^(-8) xx 0.04 xx 10^(-6)` `V = 43 m V`.
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