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Thevenin’s and Norton’s theorems are circuit simplification methods, applied to simplify complex linear circuits and making circuit analysis easy and fast. These theorems are proposed by Léon Charles Thévenin and E. L. Norton respectively. We can convert a Thevenin’s equivalent circuit to Norton’s and vice versa. Thevenin’s theorem Thevenin’s theorem states that any linear network … Read more
In an electric circuit, power flows from the source to the load. The source itself has some amount of impedance which affects the current flow. Therefore, transfer of power depends not only on the load impedance but also the source impedance. Maximum power transfer theorem speaks about the relationship between the source impedance, load impedance … Read more
Superposition theorem can be used to find the current or voltage in any circuit containing more than one independent sources. By using this method, we calculate the contribution of each independent source and sum them up. Superposition is not limited to circuit analysis but is applicable in many fields where cause and effect bear a … Read more
As we know, in a parallel circuit current divides into all branches. The current flow through each branch is inversely proportional to the resistance offered by each one them. The branch having higher resistance allows lesser current and the branch having lesser resistance allows more current. Current division rule is applied while finding current flow … Read more
Norton’s theorem is used to simplify complex linear circuits and making circuit analysis easy and fast. This theorem was proposed by E. L. Norton, an American engineer at Bell Laboratories. He came up with a new approach to simplify complex circuits containing several voltage sources, current sources and resistors with two terminals. Norton’s theorem is … Read more
Circuits can contain many power sources and power dissipation elements. It is common that any one of the elements in the circuit is a variable while all others are fixed. Thevenin’s theorem is applied in order to simplify complex circuits with a single varying load. Confused? Let us discuss a very common example: Imagine the … Read more
The relationship between the current and voltage in a circuit was studied and formulated into laws by Gustov Kirchhoff, a German Physicist in 1845. Kirchhoff’s laws state the relationship between current and voltage in an electric circuit. They are applicable for both AC and DC circuits and forms the basis for circuit analysis. Kirchhoff’s laws … Read more
Ohm’s law is one of the basic principles of electricity. It relates the basic parameters of electricity, current and voltage, to each other. Georg Ohm, after whom the law was named, conduct a few experiments on circuits containing different lengths of wires and found that the voltage applied and current are directly proportional. He derived … Read more
This article focus on explaining the similarities and dissimilarities between neutral and earth (ground). Understanding the difference between neutral and earth may be difficult in the beginning. A Lot of safety and protection-related aspects need to be carefully studied for a better understanding of the difference between them. Note: For this article, let us consider … Read more
Over-current and overload are abnormal conditions occurring in a circuit. This article well explains the difference between over-current and overload. Difference between over-current and overload Over-current Any situation in which the current flow through a device or conductor exceeds the desired value is known as over current. Both overload and short circuit can cause excessive … Read more
