If you were to expend 10 Joules of work to push a 1-coulomb charge against an electric field, what would be its voltage with respect to its voltage in its starting position? When released, what will be its kinetic energy if it flies past its starting position?

Answer 1

A one volt change in potential means that the potential electrostatic energy changes by one Joule per Coulomb.

Since you would be pushing the charge against the field, and expend 10 J, the voltage would be 10 Volts higher.

That 10 J will be converted to kinetic energy if the charge flies back to the starting position without friction.

Answer 2

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Answer 3

When released, what will be its kinetic energy if it flies past its starting position?