Thevenin Theorem and Thevenin Equivalent Voltage and Resistance

Thevenin Theorem Thevenin Theorem tells that an active circuit between two load terminals can be considered as an individual voltage source. The voltage of this source would be open circuit voltage across the terminals and the internal impedance of the source is the equivalent impedance of the circuit across the terminals. To understand Thevenin Theorem … Read more

Millman Theorem

Millman’s theorem was named after famous electrical engineering professor JACOB MILLMAN who proposed the idea of this theorem. Millman’s theorem acts as a very strong tool in case of simplifying the special type of complex electrical circuit. This theorem is nothing but a combination of Thevenin’s Theorem and Norton’s Theorem. It is very useful theorem … Read more

Substitution Theorem

As name implies, the main concept of this theorem which is based upon substitution of one element by another equivalent element. Substitution theorem gives us some special insights in circuit behavior. This theorem is also used to prove several other theorems. Statement of Substitution Theorem Substitution theorem states that if an element in a network … Read more

Kirchhoff Current Law and Kirchhoff Voltage Law

Kirchhoff’s Laws There are some simple relationships between currents and voltages of different branches of an electrical circuit. These relationships are determined by some basic laws that are known as Kirchhoff laws or more specifically Kirchhoff Current and Voltage laws. These laws are very helpful in determining the equivalent electrical resistance or impedance (in case … Read more

Superposition Theorem

If there are several sources acting simultaneously in an electrical circuit, then the current through any branch of the circuit is summation of currents which would flow through the branch for each source keeping all other sources dead. Let us understand the statement. Here, two 1.5 Volt batteries present in the circuit. At this condition, … Read more

Reciprocity Theorem

What is Reciprocal Property? In many electrical networks it is found that if the positions of voltage source and ammeter are interchanged, the reading of ammeter remains the same. It is not clear to you. Let’s explain it in details. Suppose a voltage source is connected to a passive network and an ammeter is connected … Read more

Compensation Theorem

Concept of Compensation Theorem This theorem is based on one basic concept. According to Ohm’s law, when current flows through any resistor, there would be a voltage drop across the resistor. This dropped voltage opposes the source voltage. Hence voltage drop across a resistance in any network can be assumed as a voltage source acting … Read more

Norton Theorem | Norton Equivalent Current and Resistance

Norton Theorem Any active network can be represented as an equivalent current source with an impedance connected in parallel across it. Simplifying any network by converting the active part of that network to an equivalent current source with an impedance connected in parallel is called Norton Theorem. Norton Theorem is just alternative of Thevenin Theorem. … Read more

Maximum Power Transfer Theorem

Maximum Power Transfer Theorem Suppose we have a voltage source or battery that’s internal resistance is Ri and a load resistance RL is connected across this battery. Maximum power transfer theorem determines the value of resistance RL for which, the maximum power will be transferred from source to it. Actually the maximum power, drawn from … Read more

Tellegen Theorem

This theorem has been introduced in the year of 1952 by Dutch Electrical Engineer Bernard D.H. Tellegen. This is a very useful theorem in network analysis. According to Tellegen theorem, the summation of instantaneous powers for the n number of branches in an electrical network is zero. Are you confused? Let’s explain. Suppose n number … Read more