The electric field at (30, 30) cm due to...

The electric field at (30, 30) cm due to a charge of `-8nC` at the origin in `NC^(-1)` is

`-400 (hat(i) - hat (j))`

`400 (hat(i) + hat(j))`

`-200 sqrt(2) (hat(i) + hat(j))`

`200 sqrt(2) (hat(i) + hat(j))`

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