Which of the following best describes how a transformer works? O A. Converts electric energy into mechanical energy
B. Converts the voltage of a current source
C. Converts mechanical energy into electrical energy
D. Converts the direction of current flow in a circuit

Four point charges each having charge q are located at the corners of a square having sides of length a. find symbolic expressions for the following. (a) the total electric potential at the center of the square due to the four charges (use any variable or symbol stated above along with the following as necessary: ke.) vtotal= (b) the work required to bring a fifth charge p from infinity to the center of the square (use any variable or symbol stated above along with the following as necessary: w=