Section 1: Electrical interview questions and answers about switchgear and protection What are the functions of protective relays? To detect the fault and initiate the operation of the circuit breaker to isolate the defective element from the rest of the system, thereby protecting the system from damages consequent to the fault. Give the consequences of… Read More: Electrical Engineering Interview Questions and Answers »
The Hall effect was discovered 18 years before the discovery of electrons i.e. in 1879 by Edwin Herbert Hall. This achievement happened when he was working on his doctoral degree at the Johns Hopkins University in Baltimore, Maryland, USA. What is Hall Effect The Hall effect is the production of a voltage difference (the Hall… Read More: Hall Effect & Hall Sensor »
The opposition to flow of electrons (due to bonds between protons and electrons, as well as to collisions) is called a electrical resistance (R). Or Resistance may also be defined as “The property of the electric circuit which opposes the flow of current”. The practical unit of electric resistance is ohm (.Q). It (ohm) is… Read More: Resistance vs Conductance »
Cable tray / raceway is integral part of any cable management system. Selection of cable tray is very critical because if cable tray size is not sufficient the cables may become damaged due to improper handling and excessive heating etc. On the other hand cable tray supporting system can not be neglected as well since… Read More: Cable Tray Raceway Fill and Load Calculations »
Kirchhoff’s Voltage Law states that net voltage gain and net voltage drops along a closed loop are equal. Kirchhoff’s Current Law states that at any point in the circuit the total current enters, is exactly equal to the total current leaves the point. There are some simple relationships between currents and voltages of different branches of an… Read More: Kirchhoff’s Rules Kirchhoff’s Voltage Law – Kirchhoff’s Current Law »
This page is dedicated for providing best and up to date information about the coulomb’s law. In addition you can find the definition, equation and formula for understanding the basic concept of coulomb’s law. You already know that when two charged bodies come closer there is always a force of attraction or force of repulsion. What is… Read More: Coulomb’s law Definition Equation & Formula »