A charged particle is suspended in equil...

A charged particle is suspended in equilibrium in a uniform vertical electric field of intensity 20000 V/m. If mass of the particle is `9.6xx10^(-16)` kg the charge on it and excess number of electrons on the particle are respectivly `(g=10m//s^(2))`

`4.8xx10^(-19)C,3`

`5.8xx10^(-19)C,4`

`3.8xx10^(-19)C,2`

`2.8xx10^(-19)C,1`

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