1.

The particle P shown has amass of 10mg and a charge of -0.01muC.Each plate has a surface area

Answer»

Solution :Electerical force is blanced by the weight of the MASS
` mg = qEE = 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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