A +20-NC Point Charge Is Placed at One Corner of a a Square

question 21

Multiple Choice

A +2.0-nC point charge is placed at one corner of a square (1.5 m on a side) , and a −3.0-nC charge is placed on a corner diagonally away from the first charge. What is the magnitude of the electric field at either of the two unoccupied corners?

• A) 20 N/C
• B) 14 N/C
• C) 4.0 N/C
• D) 12 N/C
• E) 8.0 N/C

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