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Three point electric charges q1 = 6µC, q...

Three point electric charges `q_1` = 6µC, `q_2` = 4µC and `q_3` = -8µC are placed on the circumference of a circle of radius 1m as shown in the figure. What is the value of the charge q, placed on the circle if the potential at the centre of the circle is zero?

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