Four Identical Point Charges (+4

question 43

Multiple Choice

Four identical point charges (+4.0 μC) are placed at the corners of a square which has 20-cm sides. How much work is required to assemble this charge arrangement starting with each of the charges a very large distance from any of the other charges?

• A) +2.9 J
• B) +3.9 J
• C) +2.2 J
• D) +4.3 J
• E) +1.9 J

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