A 10 µC Charge Is at the Origin

question 7

Multiple Choice

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.

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