PHYSICS

• Energy, whether it is mechanical, chemical, or electrical, comes in two forms: kinetic and potential
• Potential energy, which is the stored energy of an object at rest, is converted into kinetic energy when an object moves
• All electrical circuits require the storage of energy before transformed into light, heat, and motion
• Electric potential energy


  The stored energy in a circuit
• What is electric potential energy?


  Solve problems involving electric potential energy and electric potentials in contexts such as, but not limited to, electron guns in CRT TV picture tubes, conditions for merging of charge liquid drops, and Van de Graaff generators
• Explain electric potential energy

  1. Determine the electric potential energy in a uniform electric field

  2. Calculate the electric potential energy of a system of charges
• Electric charges in an electric field


  • They are comparable to the mass of objects in a gravitational field
  • The electric potential energy determines how much stored energy a charge has
• Electric potential energy


  The energy needed to move a charge against an electric field
• Potential energy can only be defined for conservative forces, where the force required to move an object from one position to another is independent of the path taken
• Electric potential


  The amount of work required to bring the unit positive charge from infinity to a certain point
• Electric potential energy


  The amount of energy required to move a charge against the electric field
• How to determine the potential energy of a charged particle in a uniform electric field


  Use the formula for electric potential energy in a uniform electric field
• Electric potential energy of two charges

  The potential energy U becomes a "shared property" of two charges
• How to determine the potential energy of two point charges

  Use the formula for electric potential energy of two charges