The figure shows three charges $q_1,q_2$ and $q_3$ situated at corners of a rectangle of sides $a=16\mathrm{.}0cm$ and $b=7\mathrm{.}0$

cm$.$

rur $q_1=4\mathrm{.}0uL,{}_2=-4\mathrm{.}0uC,$ and $q_3=1\mathrm{.}60C$ find the electric potential at the center of the rectangle.

Tries $\frac{0}{99}$

Continuing with the figure above, how much of the electric energy of the system would be expended in moving $q_3$ to

infinity while $q_1$ and $q_2$ remain in their positions?

Tries $0/99$