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Electric force or field due to several charges

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1- Calculate the force (direction and magnitude) on Q3 due to two other charges shown in the figure.
2- What is the magnitude of the electric field experienced by an electron in the hydrogen atom? In the ground state, their average separation is one Bohr radius (0.53x10^(-10) m).

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Solution Summary

We calculate the force of several point charges on another charge. This is a very common question in textbooks.
Another problem is to find the electric field in a Hydrogen atom.

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