A charged particle of mass 5 xx 10^(-5) ...

A charged particle of mass `5 xx 10^(-5) kg` is held stationary in space by placing it in an electric field of strength `10^(7) NC^(-1)` directed vertically downwards. The charge on the particle is

`-20xx10^(-5)muC`

`-5xx10^(-5)muC`

`5xx10^(-5)muC`

`20xx10^(-5)muC`

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