AP Physics C: Electricity and Magnetism / Unit 9: Electric Potential
9.3 Conservation of Electric Energy
Notes
$\Delta K=-q\Delta V$ when only electric forces act.
- An electron-volt: $1\text{ eV}=1.6\times10^{-19}$ J.
Practice
A proton is accelerated from rest through 500 V. Its KE:
$qV$ in eV.
An electron moves from low to high potential. Its KE:
Negative charge gains KE moving to higher $V$.
Total energy of a charge moving only in an electric field:
Conservative force.
Ready for more? Take the Unit 9 test.