Question

obtain equation of electric energy of a single charge.​

Answer 1

Answer:

V = k × [q/r]

V = electric potential energy,

q = point charge,

r = distance between any point around the charge to the point charge,

k = Coulomb constant; k = 9.0 × 109 N.

Answer 2

Answer:

The external electric field

and the corresponding external potential V may vary from point to point. <br> According to definition of electric potential V at a point P is the work done in bringing a unit positive charge from infinity to the point P (We assume the potential at infinity to be zero.) <br> Thus, work done in bringing a charge q from infinity to the point P in the external field is W =qV. <br> This work is stored in the form of potential energy of q , <br>

<br> If the point P has position vector

relative to origin, then potential energy at point P <br>

<br> Means potential energy in an external field = electric charge

electric potential in external field.