One Point Charge +Q Is Placed at the Center of a Square,and

question 29

Multiple Choice

One point charge +Q is placed at the center of a square,and a second point charge -Q is placed at the upper-left corner of the square.It is observed that an electrostatic force of magnitude 2.0 N acts on the positive charge at the center.Now a third charge -Q is placed at the lower-left corner of the square,as shown in the figure.What is the magnitude of the net force that acts on the center charge now?

• A)0.0 N
• B)2.8 N
• C)4.0 N
• D)5.3 N

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