Electrical4U 
The steam turbine is a favourite prime mover in a steam power generating plants. The steam turbine may be of capacity from 5 megawatts 2000 megawatt. The advantages of a steam turbine over a diesel engine are as follows. Steam enters the turbine at high pressure and temperature. After turning the rotor, the steam exits … Read more
The world is slowly but continually moving towards a greener future. There is much excitement among engineers about the prospects of greener technology. However, coal-based power plants are still the primary source of electrical power in many countries. Baring few countries in the world like Norway or Iceland, all other countries depend heavily on coal … Read more
When switching off a circuit breaker to cut an inductive load, it’s best to interrupt the current at the zero crossing of the current waveform. However, this is difficult to achieve exactly. In normal circuit breakers, current interruption occurs near, but not exactly at, the zero crossing point. Because the load is inductive, this sudden … Read more
An operational amplifier or op amps is a linear device used for ideal DC amplification. It is fundamentally a voltage amplifying device that works with external feedback components like resistors or capacitors. An op amp has three terminals: inverting input, non-inverting input, and output. As you can see from the diagram, op amp has three … Read more
Before diving into the tuned collector oscillator, let’s understand what is an oscillator. An oscillator is an electronic circuit that generates an oscillating signal, like a sine or square wave. It converts a DC signal into an AC signal and is used in devices like TVs, clocks, radios, and computers. One of the simplest LC … Read more
“Maintenance” as the name suggests it is the action necessary for retaining or restoring a piece of equipment or machine to the specified operable condition to achieve its maximum useful life. Maintenance can be classified into two groups: Maintenance is defined as any action that increases the life of equipment and helps it run more … Read more
A Stirling Boiler is defined as a basic type of bent tube boiler commonly used in modern thermal power generating plants . It has one of the largest capacities among boilers, capable of generating up to 50,000 kg of steam per hour and producing pressure up to 60 kgf per cm². Designed by Alan Stirling … Read more
What is an Ideal OP Amp? An operational amplifier (OP Amp) is defined as a direct current coupled voltage amplifier that increases the input voltage passing through it. Ideally, an OP Amp should have high input resistance, low output resistance, and very high open loop gain. In an ideal OP Amp, the input resistance and … Read more
A rotor is the rotating part of an electrical machine, where current is induced by a rotating magnetic field through transformer action. Induction motor rotor is of two types: Squirrel Cage Rotor In this type of rotor, the rotor winding consists of conductors, in form of copper or aluminum bars embedded in semi-closed slots of … Read more
The expression of the pressure difference between inside and outside of a chimney shows that it has a term which is the height of the chimney. To achieve sufficient pressure difference between two points or to attain enough natural draught we have to increase the height of the chimney which is not always practical in … Read more