Question

a)Explain all possible basic strategies needed to work Kirchhoff's voltage and current law questions of circuits.Not necessarily just defining the concepts but throwing more light on how the loop and current directions affect the values(either positive or negative). Also give basic strategies to solve parallel and series connection or both.Also talk about tricks to find voltage drop across resistors.Kindly explain it to the basic level.Basically how to determine a Kichhoff's Voltage and current equation using direction of current and loop.Thank you

Answer 1

KIRCHOFF'S VOLTAGE LAW : Kirchoff's Voltage Law states that the sum of aa voltages in a closed loop is always equal to zero. It is based on law of conservation of energy(i.e. energy can neighter be created no be destroyed). For applying Kirchoff's Voltage Law to any electric circuit we take various assumptions such as:

• Rise in Potential : +ve
• Drop in Potential : -ve

Kirchoff's Voltage Law is very helpful in doing Mesh analysis to find various circuit parameters (Voltage, Current, Resistance etc). A circuit may consist of 'N' number of nodes and 'B' number of branches. The total number of KVL equations (M) required to solve an electric circuit can be given by the formula:

• M = B - (N+1)

KIRCHOFF'S CURRENT LAW : Kirchoff's Current Law states that the alzebric sum of currents entering a node is always equal to zero OR The current entering a node is equal to the current leaving that node. It is based on law of conservation of charge(i.e. charge can neighter be created no be destroyed). For applying Kirchoff's Current Law to any electric circuit we take various assumptions such as:

• Incoming Current : +ve
• Outgoing Current : -ve

Kirchoff's Current Law is very helpful in doing Nodal analysis to find various circuit parameters (Voltage, Current, Resistance etc). The total number of KCL equations (M) required to solve an electric circuit can be given by the formula:

• M = N - 1

To understand the basic stratergies to solve parallel and series connection in an electric circuit you can refer the figures given below: