(Solved): 9. Three point-like charges are placed as shown in the figure, \( a=38.0 \mathrm{~cm} \) and \( b=6 ...

9. Three point-like charges are placed as shown in the figure, \( a=38.0 \mathrm{~cm} \) and \( b=60.0 \mathrm{~cm} \). Find the electric potential at point (A). Let \( q_{1}=+2.10 \mu \mathrm{C}, q_{2}=+3.70 \mu \mathrm{C} \), and \( q_{3}=-4.90 \mu \mathrm{C} \). V