Question

electrostatic potential energy of a system of three charges

Answer 1

\[U=K\left(\frac{q_1q_2}{r_{12}}+\frac{q_1q_3}{r_{13}}+\frac{q_2q_3}{r_{23}}\right)\]

Answer 2

right?

Answer 3

yes it is
so what?...!!

Answer 4

so i must be pressing the wrong number on the calculator then

Answer 5

no it is not
it is valid only for point charges
so better check it !

Answer 6

the charges are points in my question

Answer 7

then it is all right !!..

Answer 8

now i see what i was forgetting