Energy and Power Relations in Mechanical and Electrical Systems

In the case of the mechanical system we are concerned with friction, mass (inertia), and elasticity. Motion in combination with friction gives rise to heat, i.e., mechanical energy is converted into thermal energy. Kinetic energy is stored from motion in combination with distortion (elasticity). Similarly, in the electrical system an electric current encountering resistance produces heat and electrical energy is converted into thermal energy. A current in an inductive circuit produces magnetic flux, thus storing kinetic energy. Potential energy is stored in the dielectric of a capacitive circuit when there is a flow of electric current.