In: Physics
Suppose you have a number of charges, greater than two. The first charge is located somewhere and suppose it is held in place. How much work is done to bring the second charge in from infinity to its final location? Now hold that charge fixed as well and bring in the third charge, how much work is done? Now hold the third charge fixed in place as well and bring in the fourth charge, how much work is done? What is the total for establishing the configuration of the four charges?