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Problem 10: Two point charges are located on the x-axis: Qı =+90µC is at x=0, and Q2
is at x=20.0cm. The total electric field, E, produced by both charges, is found to vanish,
|E|=0, at x=24.0cm. Therefore, Q2 is
(A) +2.5 µC.
(В) —15. дС.
(С) —2.5 дС.
(D) +15. ДС.
(E) —10. дС.

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