A 10 µC charge is at the origin. A -15 µC charge is on the x-axis 10 cm to the right of the origin. At what point other than at infinity can a 1 µC charge be placed so that there will be no net electrostatic force on it?
A) At one point on the x-axis to the left of the positive charge.
B) At some point off the x-axis either above or below.
C) At one point between the two charges.
D) At one point on the x-axis to the right of the negative charge.
E) At no point.

Question

Quizplus · Accepted Answer

The 1 µC charge can be placed on the x-axis to the left of the positive charge where the forces due to the 10 µC and -15 µC charges balance each other.

A 10 µC Charge Is at the Origin