Identical Point Charges (+30 μC) Are Placed at the Corners

question 107

Multiple Choice

Identical point charges (+30 μC) are placed at the corners of a rectangle (4.0 m × 6.0 m) . How much external energy is required to bring a charge of 55 μC from infinity to the midpoint of one of the 6.0-m long sides of the rectangle?

• A) 22 J
• B) 16 J
• C) 13 J
• D) 19 J
• E) 8.0 J

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