Problem 3

 Problem 3

Three identical point charges of 1 C each are located at the vertices of an equilateral triangle, and this system has a potential energy of 1 J. (There is no in our consideration of other charges or external fields)

What would be the potential energy with the same arrangement of point charges, if the charges had different values, for example, the following: -1 C, 2 C, and 3 C?

Problem 2

 When two electric charges occupy the positions shown in Figures 1 and 2, the values of the Coulomb force between the charges are known, respectively F₁ and F₂.

Find the force of the Coulomb interaction of charges when they occupy the position shown in Figure 3.

Problem 1

Two point-objects carrying the same electric charge are keeping at some distance from each other by a string, which exerts on objects only its known tension force T₁ and does not participate in electrostatic interaction.
If four such point-objects with the same as previous charges are attached to a string at the same distance from each other as before, what will be the tension T₂ in the middle of the string?