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What will happen to the potentail energy...

What will happen to the potentail energy of the system ?
If (i) Two same charged particles are brought towards each other
(ii) Two oppositely charged particles are brought towards cach other

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(i) When the same charged particles are brought towards each other, the potential energy of the system will increase. Because work has to be done against the force of repulsion. This work done only stored as potential energy
(ii) When two oppositely charged particles are brought towards each other, the potential energy of the system will decrease. Because work is done by the force of attraction between the charged particles
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