Two electric dipoles, A, B with respective dipole moments `vec(d_(A))=-4" qa "hati and vec(d_(B))=-2" qa "hati` are placed on the x-axis with a seperation R, as shown in the figure The distance from A at which both of them produce the same potential is :
A
`(R)/(sqrt(2)+1)`
B
`(sqrt(2)R)/(sqrt(2)+1)`
C
`(R)/(sqrt(2)-1)`
D
`(sqrt(2)R)/(sqrt(2)-1)`
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