Identical Point Charges (+50 μC) Are Placed at the Corners

question 41

Multiple Choice

Identical point charges (+50 μC) are placed at the corners of a square with sides of 2.0-m length. How much external energy is required to bring a fifth identical charge from infinity to the geometric center of the square?

• A) 41 J
• B) 16 J
• C) 64 J
• D) 10 J
• E) 80 J