Deduce and expression for the electric …
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Gaurav Seth 5 years, 1 month ago
The magnitudes of the electric field due to the two charges +q and -q are given by,

The directions of E+q and E-q are as shown in the figure. The components normal to the dipole axis cancel away. The components along the dipole axis add up.


Therefore, Total electric field.
E = - (E+q + E-q) cosθ p [Negative sign shows that field is opposite to p]
At large distances (r>>a),this reduces to
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