A particle of charge -q1 is at the origin of an x axis. (a) At what location on the axis should a particle of charge -4q1 be placed so that the net electric field is zero at x = 2.0 mm on the axis? (b) If, instead, a particle of charge +4q1 is placed at that location, what is the direction (relative to the positive direction of the x axis) of the net electric field at x = 2.0 mm?

Physics for Scientists and Engineers: Foundations and Connections
1st Edition
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Katz, Debora M.
Chapter24: Electric Fields
Section: Chapter Questions
Problem 14PQ: A particle with charge q on the negative x axis and a second particle with charge 2q on the positive...
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A particle of charge -q1 is at the origin of
an x axis. (a) At what location on the axis should
a particle of charge -4q1 be placed so that the
net electric field is zero at x = 2.0 mm on the
axis? (b) If, instead, a particle of charge +4q1 is
placed at that location, what is the direction (relative to the positive
direction of the x axis) of the net electric field at x = 2.0 mm?

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