Question

what is formula for field due to a dipole at equatorial point ?​

Answer 1

Answer:

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Explanation:

the negative sign implies that the direction of electric field is opposite to the direction of the distance i.e. inward to the charge. So, the resulting electric field will be in a horizontal direction. From the diagram we get, cosθ=l√r2+l2and using eq. (2) we get the value of dipole moment as: p=q×2l=2lq.