Question 19 D An electron is accelerated in an electric field through a potential difference of +2400 V. Which of the following justifies why the change in kinetic energy can be calculated using AU = QAV?
А
The electric field exerts a force on the electron that is proportional to the electron's charge
B
The change in potential energy of the field electron system is equal to the change in kinetic energy of the particle
с
The work done on the particle by the field is equal to the electric force times the distance the electron moves.
D
Changes in potential and kinetic energies are always equal.