Select from below what happens as a proton moves in the direction of the electric field lines. Include a sketch of the scenario.
a) it is moving from low potential to high potential and gaining electric potential energy.
b) it is moving from low potential to high potential and losing electric potential energy.
c) it is moving from high potential to low potential and gaining electric potential energy.
d) it is moving from high potential to low potential and losing electric potential energy.
e) both its electric potential and electric potential energy remain constant.

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