Lesson: Electric Potential Energy of a Charged ParticlePhysics
In this lesson, we will learn how to use the electric fields of distribution of electric charges to determine the electrical potential energy of charges.
Sample Question Videos
An ion with twice the charge of an electron is accelerated from rest to a kinetic energy of 32.0 keV by the electric-field between two parallel conducting plates. If the plates are separated by a distance of 2.00 cm, what is the electric-field strength between the plates?
Proton charge is C.
A negative hydrogen ion is a hydrogen atom containing two electrons. An electron and a negative hydrogen ion are accelerated through the same potential. Find the ratio of their speeds after acceleration, assuming the speeds are non-relativistic. Use a value of kg for the mass of the hydrogen ion.
To form a helium atom, an alpha particle that contains two protons and two neutrons is fixed at one location, and two electrons are brought in from far away, one at a time. The first electron is placed at m from the alpha particle and held there while the second electron is brought to m from the alpha particle on the other side from the first electron, as shown.
The charge of an electron is C and the charge of a proton is C.
How much work is moving the first electron?
How much work is moving the second electron?
What is the electrostatic energy of the alpha particle and two electrons at their final positions?