The figure shows two arcs of a circle on which charges +Q and -Q have been spread uniformly. What is the value of the electric potential at the center of the circle? 
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Q3: Four equal +6.00-μC point charges are placed
Q5: Two +6.0-μC point charges are placed at
Q6: If the electrical potential in a region
Q7: Three point charges of -2.00 μC, +4.00
Q8: A +4.0 μC-point charge and a -4.0-μC
Q10: If the electric potential at a point
Q11: A -7.0-μC point charge has a positively
Q11: A negative charge,if free,will tend to move
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Q11: When the electric field is zero at
Q12: Suppose you have two negative point charges.As
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