Review work and potential energy definitions. Review gravitational potential energy. Discuss that a charged particle can have a potential energy by virtue of its location in an electric field. Discuss how a charged particle placed in an electric field can have potential energy when work is done to move a charge within the field. Define electrical potential energy. Define the volt unit as joules/coulomb. Discuss how a capacitor works to store electrical energy and work with diagrams to best show how it works.