Two points charges Q and -3Q are placed at some distance apart if the electric field at the location of Q is E then the field at the location of -3Q is
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Let the distance between the two points be d.
The electric field due to a charge "q" is given by: kQ÷(d^2)
Now the electric field due to a charge of -3Q at Q is given by= k(3Q)÷(d^2)
The electric field due to charge Q at -3Q is given by=k(Q)÷(d^2)
which is 1÷3 rd of the field due to charge -3Q at Q , which is equal to E÷3.
The location of field will be directed away from the charge Q and will be of magnitude E÷3.
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