To do anything we need basics.so first we will go with basics
Basic Laws: Ohm’s law, Kirchhoff’s voltage and current laws, Nodes-Branches and loops, Series elements and Voltage Division, Parallel elements and Current Division, Star-Delta transformation, Independent sources and Dependent sources, source transformation.
OHM’S LAW : At constant temperature, the current flowing through a conductor is directly proportional to the potential difference(p.d) in volts across the two ends of the given conductor and inversely proportional to the resistance (R) in ohms (Ω) between the ends of the same conductor.
In all practical problems of electrical calculations, it is assumed that the temperature rise is within limits, so that electrical properties such as insulation and conduction properties of the given materials are not destroyed.
hence ohms law mathematically stated as I=V/R or V=IR.
KIRCHOFF’S CURRENT LAW : KCL states that the total current entering a junction is equal to the total current leaving the junction.
(or)
The algebraic sum of the currents at the junction (node) will be zero.
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