The particle P shown has a mass of 10mg and a charge of `-0.01mu C.` Each plate has a surface area 100 cm2 one side .What potetial difference V should be applied to the combination to hold the particle p in equilibrium

Explanation

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`.