These laws define how each circuit parameter is interrelated.
It is the most common (and most simple) formula used in electronics.
Ohm’s law can be written in several ways, all of which are commonly used.

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This information helps you choose the right-size component with the proper power rating for a given software.
It also dictates the size of the power supply for the system.
Kirchhoff’s Circuit Laws
Kirchhoff’s circuit laws tie Ohm’s law into a complete system.
Kirchhoff’s Current Law follows the principle of conservation of energy.
A simple example ofKirchhoff’s Current Lawis a power supply and resistive circuit with several resistors in parallel.
One of the nodes of the circuit is where all the resistors connect to the power supply.
Kirchhoff’s Voltage Law also follows the principle of conservation of energy.
It states that the sum of all the voltages in a complete loop of a circuit must equal zero.