Question

Consider a small electric dipole with a magnitude of dipole moment p which is placed far away from point A as shown in fig

Answer 1

Explanation:

Given Consider a small electric dipole with a magnitude of dipole moment p which is placed far away from point A  

• Given the magnitude of electric dipole moment is p.
• From point A at a point distance r, the dipole moment tries to rotate the dipole under this situation.
• Now considering the position of P, the resultant potential at A is  
• V A = K p cos π / r^2
•       = K p (- 1) / r^2 (since cos π = - 1)

     = - K p / r^2

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