An electron and a proton are getting attracted towards each other by the virtue of internal electrostatic attraction. In the process, assuming infinity as our reference point, the P.E of the proton-electron system-
A
Increases
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B
Decreases
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C
Remains the same
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D
First increase then decrease
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Solution
The correct option is B
Decreases
In process, the work done by internal conservative force is positive, which implicates that the potential energy of the electron - proton system must decrease.