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In the figure , a = 7.90 cm. If q2 is in a state of static equilibrium and the positive charge in the centre

In the figure , a = 7.90 cm. If q2 is in a state of static equilibrium and the positive charge in the centre is 3.18 nC, what would q, be? (Hint: The charge should be negative.) Answer: 91 a + a 92

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