Question
JUST ANSWER PART C - THANKS
In case E a positive point charge with +Q is a distance s away from a third positive point charge +q. In case F ten positive point charges, each with charge +Q/10,lie along an arc of radius s centered on a positive point charge +q. Is the net electric force on the +q charge in case E greater than, less than, or equal to the net electric force on the +q charge in ease F? Explain. A thin semicircular rod has a total charge +Q uniformly distributed along it. A negative point charge -Q is placed as shown. A test charge +q is placed at point C. (Point C is equidistant from -Q and from all points on the rod.) Let FP and FR represent the force on the text charge due to the point charge and the rod respectively. Is the magnitude of FG, greater than, less than, or equal to the magnitude of FR? Explain how you can tell.
Explanation / Answer
the force between +q and +Q is
F = k x (qQ/s^2)
where k = (1/4pi x e_o) = 9 x 10^9 Nm^2/C^2 and s is the distance between the charges
the force in case E is greater than in case F
