Two point charges +8q and -2q are located at x=0 and x=L respectively. The point on x-axis at which net electric field is zero due to these charges is

Q. Two point charges +8q and -2q are located at x=0 and x=L respectively. The point on x axis at which net electric field is zero due to these charges is-
(i) 8L
(ii) 4L
(iii) 2 L
(iv) L

Answer: (iii) 2 L

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