Potential due to point-charges: 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? 
Correct Answer:
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Q23: Potential due to point-charges: Two point charges
Q24: Potential energy of point-charges: A -3.0-μC point
Q25: Potential due to point-charges: Two +6.0-μC point
Q26: Potential due to point-charges: A -7.0-μC point
Q27: Potential energy of point-charges: A very small
Q29: Potential energy of point-charges: Two equal point
Q30: Spheres of charge: A sphere with radius
Q31: Potential energy of point-charges: Two point charges
Q32: Potential due to point-charges: A half-ring (semicircle)
Q33: Potential due to point-charges: Four equal +6.00-μC
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