posted by Natasha .
Two charges, -17 and +3.6 µC, are fixed in place and separated by 3.2 m.
(a) At what spot along a line through the charges is the net electric field zero? Locate this spot relative to the positive charge. (Hint: The spot does not necessarily lie between the two charges.)
(b) What would be the force on a charge of +1 µC placed at this spot?