Jee mains pyq physics

Question

Two point charges A and B of magnitude +8 x 10-6C and -8 x 10-6C respectively are placed at a distance d apart. The electric field at the middle point O between the charges is 6.4 x 104 NC-1. The distance 'd' between the point charges A and B is: (A) 2.0 m (B) 3.0 m (C) 1.0 m (D) 4.0 m

Answer 1

Here i have solved the question:The answer is option (b) which is 3m

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