An electron is released from rest in a regionof space with a nonzero electric field. (a) As the electron moves,does the electric potential energy of the system increase, decrease,or stay the same? (b) Choose the best explanation from among thefollowing:I. Because the electron has a negative charge its electric potential energy doesn’t decrease, as one might expect, but increases instead.II. As the electron begins to move, its kinetic energy increases.The increase in kinetic energy is equal to the decrease in theelectric potential energy of the system.III. The electron will move perpendicular to the electric field, andhence its electric potential energy will remain the same

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Electric Charges and Fields

One of the fundamental properties is the electromagnetic property. Charge cannot be destroyed by any process and this contributes formally to the law of charge conservation.