Resistance calculator

Resistors are the basic building blocks of a circuit. They are used in circuits as voltage dividers, current limits, termination for communication links, etc. It is important to know how to calculate their ohmic value by referring to the color codes of the resistor. Here is a simple and easy-to-use resistance calculator. Resistance calculator tool … Read more

Steps to convert Thevenin’s circuit to Nortons

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

Maximum Power transfer theorem

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

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

Current Division rule

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

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

Thevenin’s Theorem -explanation, equivalent circuit & examples

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

Ohm’s Law – Relationship between current and voltage

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

Difference between Higher potential and lower potential

Before getting into the topic, we have to keep two points in mind.1. Conventional Current flow. (The way Current is said to flow historically)2. ‎Actual current flow. (The way Current actually flows). By definition, current is the flow of charges, basically electrons. It is said to flow from a point of higher potential to lower … Read more

Voltage division rule | Potential divider circuit

The voltage division rule is one of the basic rules of circuit analysis. It is applicable to all series and combination resistor circuits. A series connection of resistors always acts as a voltage divider. In a series connection, the same current flows through each resistor. Hence the voltage drops across each of them are proportional … Read more