Point Charges of Equal Magnitudes (25 NC) and Opposite Signs

question 21

Multiple Choice

Point charges of equal magnitudes (25 nC) and opposite signs are placed on (diagonally) opposite corners of a 60-cm *80-cm rectangle.If point A is the corner of this rectangle nearest the positive charge and point B is located at the intersection of the diagonals of the rectangle, determine the potential difference, VB - VA.

• A)(-47 V)
• B)+94 V
• C)zero
• D)(-94 V)
• E)+47 V

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