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Two electric dipoles, A, B with respective dipole moments i ˆ qa 4 d A − = → and i ˆ qa 2 d B − = → are placed on the x-axis with a separation R, as shown in the figure. The distance from A at which both of them produce the same potential is - R A B X

1. 1 2 R 2 +
2. 1 2 R +
3. 1 2 R 2 −
4. 1 2 R −

Correct answer: 1 2 R 2 −

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