define Electron volt and electrostatic force
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The electron-volt is a unit of energy or work. An electron-volt (eV) is the work required to move an electron through a potential difference of one volt. Alternatively, an electron volt is equal to the kinetic energy acquired by an electron when it is accelerated through a potential difference of one volt. Since the magnitude of the charge of an electron is about 1.602×10^−19 C, it follows that an electron-volt is about 1.602×10^−19 J. Note also that, because the charge on an electron is negative, it requires work to move an electron from a point of high potential to a point of low potential.
The electrostatic force is also known as the Coulomb force or Coulomb interaction. It's the attractive or repulsive force between two electrically charged objects. Like charges repel each other while unlike charges attract each other. Coulomb's law is used to calculate the strength of the force between two charges. Specifically, electrostatic force is the physical reaction that holds together the electromagnetic field created by subatomic particles, such as electrons and protons. In order for electrostatic forces to remain cohesive, these particles need to independently maintain both positive and negative charges and react to each other accordingly.
The electron-volt is a unit of energy or work. ... Note also that, because the charge on an electron is negative, it requires work to move an electron from a point of high potential to a point of low potential. The electrostatic force is also known as the Coulomb force or Coulomb interaction.