What is the electric field strength inside the hole at radial distance rr << aa in a plane that is perpendicular to the cylinder through the center of the hole? Hint: Can you create this charge distribution as a superposition of charge distributions for which you can use Gauss's law to find the electric field?

Four objects each with charge +2.0×10−7c are located at the corners of a square whose sides are 2.0 m long. part a what quantities can be determined using this information? check all that apply. the electric force on a charged object placed at the center of the square. the mass of each object. the total electric potential energy of the system consisting of the four charged objects. part b find the electric force on a charged object placed at the center of the square.