The form might be a moving mass, light, heat, an elevated mass, particular chemical combinations, or electricity in a wire. Power is simply the rate at which energy is converted (for example, a Watt is one Joule per Second). Here are some of the ways that you will see Energy and Power represented: Modify the value in any box and see what happens... Start studying Physics Final Chapter 34 & 35 (1-30 is Chapter 34 31- is Chapter 35). Learn vocabulary, terms, and more with flashcards, games, and other study tools. Use the expression for the power dissipated through a resistance and the power delivered in a circuit to calculate the resistances, emf of the battery, and also the total electrical power consumption in all resistors. The expression for the power dissipated through a resistance is given by, Here, i is the current and R is the resistance.