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In an atom two protons are separated by a distance of $3 \times 10^{–10}\; m$ and an electron is at a distance of $1.5 \times 10^{–10}$ m from each proton. Calculate the potential energy of this system.

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$(A)\; 7.68 \times 10^{-19} \;J$
Hence A is the correct answer.
answered Jun 11, 2014 by meena.p

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