Determine the value of electric potential at any point due to dipole.

1.	Determine the value of electric potential at any point due to dipole.
Answer» We already know that electric dipole is an arrangement which consists of two equal and opposite charges +q and -q separated by a small distance 2a.Electric dipole moment is represented by a vector p of magnitude 2qa and this vector points in direction from -q to +q. To find electric potential due to a dipole consider charge -q is placed at point P and charge +q is placed at point Q. Since electric potential obeys superposition principle so potential due to electric dipole as a whole would be sum of potential due to both the charges +q and -q. Thus V = 1/4piEo ( q/r1 - q/r2) where r1 and r2 respectively are distance of charge +q and -q from point R.

Answer»

We already know that electric dipole is an arrangement which consists of two equal and opposite charges +q and -q separated by a small distance 2a.Electric dipole moment is represented by a vector p of magnitude 2qa and this vector points in direction from -q to +q. To find electric potential due to a dipole consider charge -q is placed at point P and charge +q is placed at point Q.

Since electric potential obeys superposition principle so potential due to electric dipole as a whole would be sum of potential due to both the charges +q and -q. Thus

V = 1/4piEo ( q/r1 - q/r2)

where r1 and r2 respectively are distance of charge +q and -q from point R.

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