- Homework Statement:
question 22 on the multiple choice near the end
- Relevant Equations:
- no equations
I understand how they arrived at the answer of 2Q , but i have a couple of questions on this. If one of the charges were negative for example how would the resultant potential be found then? at the middle point would i add the positive charges and subtracted the negative ? Also what would the potential be at for the corner , for example the bottom left corner assuming the charges were Q, Q, Q , 2Q?