[" a) Write an expression for potential energy of "],[" two charges "q1" and "q2" at "r1" and "r2" in a uniform "],[" electric field "E.]

Write an expression for potential energy of two charges q_(1) and q_(2) at vec(r_(1)) and vec(r_(2)) in a uniform electric field vec(E) .

Give the expression for potential energy of a system of two charges q_1 and q_2 in an external field.

The electric potential enegy U of the system of charges q_1 and q_2 is

Give expression for 'potential energy' of charge 'q' at a distance 'r' in an external electric filed ?

Deduce an expression for the potential energy of a system of two point charges q_1 and q_2 located at positions r_1 and r_2 respectively in an external field (vecE)

Write an expression for potential at a point P vec(( r)) due to two point charges q_(1) and q_(2) at vec(r_(1)) and vec(r_(2)) respectivley.

Deduce the expression for the potential energy of a system of two point charges q_1 and q_2 brought from infinity to the points vecr_1 and vecr_2 respectively in the presence of electric field vecE .

(a) Depict the equipotential surfaces for a system of two identical positive point charges placed a distance 'd' apart. (ii) Deduce the expression for the potential energy of a system of two point charges q_1 and q_2 brought from infinity of the points vecr_1 and vecr_2 respectively in the presence of external electric field vecE .