Thanks for your reply,
That was a typo in the equation - thanks for pointing it out!
So i have V=(keQ)/r but what is my r! i.e in the equation there is a q and an r but r relates the distance between two point charges so which value for q do you use?
Following further study i have attempted...
This is not a homework assignment but a question from a past exam paper as i am studying for an exam on monday. I am one of only 3 out of 150 who have never done physics before this, the first year of an electronics degree. I would really appreciate any help.
1) A charge q1=1e-4C is in a...