Charges of -q and +2q are fixed in place, with a distance of 2.00mbetween them.
ID: 1666821 • Letter: C
Question
Charges of -q and +2q are fixed in place, with a distance of 2.00mbetween them. A dashed line is drawn through the negative charge,perpendicular to the line between the charges. On the dashed line,at a distance L from the negative charge, there is at least onespot where the total potential is zero. Find L.
Charges of -q and +2q are fixed in place, with a distance of 2.00mbetween them. A dashed line is drawn through the negative charge,perpendicular to the line between the charges. On the dashed line,at a distance L from the negative charge, there is at least onespot where the total potential is zero. Find L.
Explanation / Answer
The potentials of both charges at that point must be:
V1 + V2 = 0
Draw a triangle with vertices: -q (point A),2q(point B), and a point on the dashed line (I will call it P).
AP = r.......................................