Circuit Theory

Transformer Action

Transformer action is a phenomenon by which EMF(Electro-motive force) is induced in from one coil to the other coil by electro magnetic induction. It is the basic principle of electric transformers. When a certain AC voltage is applied to a coil, current, proportion to the applied voltage and inversely proportional to the impedance, flow through … 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

Series and Parallel circuits

Current flow in a circuit is determined by the impedance offered by the circuit components, which is in turn determined by the way circuit components are connected. Series and parallel circuit connections are the two simplest ways of connecting a circuit. Series connection Series connected circuits consist of two or more active and/or passive devices … Read more

Difference between volts and watts

Volts and watts are two of the most common and key terms in the field of Electrical and Electronics Engineering. Most of the times these terms confuse the newbie or those who have just started learning Electrical sciences. Even though these two terms sounds alike, they are different from each other. Here is a simple … Read more

The direction of electric current

The direction of electric current can be a bit confusing topic. Here we have addressed your query. Hope this article shall be helpful to you in understanding the direction of current flow. Every particle in the nature other than the insulators* has a large number of free electrons in them. These electrons move randomly in … Read more

What is a short circuit?

A short circuit is a situation in which two or more different lines (having different voltage levels/ different phase/ different terminals) come in contact and finally leads to the flow of large short circuit currents that may damage the equipment or the system. In a three-phase system, a occurs when two or more phases come … Read more

Working of Diode rectifiers (Uncontrolled rectifiers)

Introduction Circuits that are used to convert the Alternating Current (AC) input power into a Direct Current (DC) output power is known as rectifier circuits. Rectifiers are found in almost all equipment, from a low voltage battery charger to High Voltage DC transmission systems. Basically, rectifiers are classified into Controlled rectifiers and uncontrolled rectifiers. In … Read more

What is inductance?

  It is a property of a circuit element called inductor to store energy in the magnetic field when current passes through it. A basic inductor can be made by simply twisting a coil of a certain length. If current passes through an inductor, an electro magnetic field is formed.  Any change in the magnitude … Read more