How Do You Calculate Power In A Circuit?
To calculate electric power for a circuit, all you need to remember is that the power being drawn from the source must be equal to the power dissipated by the components inside the circuit. You may also find it necessary to use Kirchoff’s rules to find the voltage or current inside. Examine the circuit carefully. The net power in has to equal the net power out. Energy is being drawn from the power source and transferred to other components or devices, and is then dissipated or changed to a different form. For each circuit element, pick the proper equation. For all elements, P = VI. Resistors and resistive devices additionally can have their power calculated using either I^2*R or V^2/R. If the internal resistance of a battery is taken into account, you must also use I^2*r. If necessary, use Kirchoff’s rules to find the total voltage or current of the circuit. Kirchoff’s rules state that the total voltage in is the total voltage out, and the total current entering a junction must be equa
