Question

Two point charges lie on the x axis. A charge of + 2.60 pC is at...

Two point charges lie on the x axis. A charge of + 2.60 pC is at the origin, and a charge of − 4.80 pC is at x=−13.0cm.

What third charge should be placed at x=+20cm so that the total electric field at x=+10.0cm is zero?

Express your answer to three significant figures and include appropriate units

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