Question

its answer is 2nd . but I want reason. please help​

Answer 1

Answer:

The net electric field at P is upwards due to the two positive charges, and since the null point is at centre , so the graph will start from centre and go up till the forces ( due to the two charges) are dominant and when the point reaches infinity, r tends to infinity so E tends to 0( zero) , and so the graph will come down again

Therefore option 2 is correct