How do we define energy efficiency? A. The ratio of the actual output energy to the input energy

B. The ratio of the power gain to power loss

C. The product of input power and output power

D. The sum of potential and kinetic energy

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.