Charge Q1 and charge -3Q are 1 meter apart. Consider only points on the axis between the charges. A.) Where is V=0? B.) Where is E=0?
The Attempt at a Solution
A.) The positions where the electric potential would be zero would be to add the potentials due to the individual charges and set equal to Zero, correct?
After this, the algebra gets very messy and I can't figure out how to approach it to isolate r_2.
B.) Haven't attempted this yet. Hints on how to from part A to B?