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This blog is a place for electrical and electronics engineering students providing unique and quality resources and articles. It also provide information about projects of electrical and electronics.


This blog consist a lot of interview questions which are asked in most exam.

There are following topics in this blog

  • electrical machines
  • power system
  • power electronic
  • electrical measurements
  • electronic devices
  • Emphasizes the conceptual understanding of each topic, logical approach
  • plenty of illustration the theoretical concepts

My name is Prabhat. I'm an Electrical Engineering student as well as an enthusiast blogger. I am studying in the second year of B.E. (Electrical) in Rajasthan Techanical University Rajasthan, India.


I have started this blog with an intention of helping electrical engineering students to understand the basics of electrical engineering in easy words. This blog is mostly targeted to those students from countries where English is not a native language, like India. Such students find it quite hard to understand very clearly from a reference book, just because the language used in most of the reference books is really hard to understand. Do you think that basics of electrical can be understood clearly and easily from this blog. Am I doing it good? I hope that I'm keeping my words and my posts are helping you.



I like to stay in touch with my readers. So, never hesitate to get in touch.

You can always drop a mail at here or the form below delivers me your message instantly. Your every suggestion, query or feedback is always welcome.

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Demagnetising and Cross Magnetizing Conductors

The conductors which are responsible for producing demagnetizing and distortion effects are shown in the Fig.1. Fig. 1        The brushes are lying along the new position of MNA which is at angle θ  from GNA. The conductors in the region AOC = BOD = 2θ  at the top and bottom of the armature are carrying current in such a direction as to send the flux in armature from right to left. Thus these conductors are in direct opposition to main field and called demagnetizing armature conductors.         The remaining armature conductors which are lying in the region AOD and BOC carry current in such a direction as to send the flux pointing vertically downwards i.e. at right angles to the main field flux. Hence these conductors are called cross magnetizing armature conductors which will cause distortion in main field flux.        These conductors are shown in the Fig. 2 Fig. 2  ...
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Armature Voltage Control Method or Rheostatic Control of dc motor

Speed Control of D.C. Shunt Motor (Part2)  2. Armature Voltage Control Method or Rheostatic Control        The speed is directly proportional to the voltage applied across the armature. As the supply voltage is normally constant, the voltage across the armature can be controlled by adding a variable resistance in series with the armature as shown in the Fig. 1. Fig. 1 Rheostat control of shunt motor        The field winding is excited by the normal voltage hence I sh is rated and constant in this method. Initially the reheostat position is minimum and rated voltage gets applied across the armature. So speed is also rated. For a given load, armature current is fixed. So when extra resistance is added in the armature circuit, I a remains same and there is voltage drop across the resistance added ( I a R). Hence voltage across the armature decreases, decreasing the speed below normal value. By varyi...
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Characteristics of Separately Excited D.C. Generators

The characteristics is separately excited d.c. generator are divided into two types, 1) Magnetization   and         2) Load characteristics. 1.1 Magnetization or Open Circuit Characteristics         The arrangement to obtain this characteristics is shown in the Fig. 1. Fig. 1  Obtaining O.C.C. of separately excited generator        The rheostat as a potential driver is used to control the field current and the flux. It is varied from zero and is measured on ammeter connected.        E o  = (ΦPNZ) / (60A)        As I f is varied, then Φ change and hence induced e.m.f. E o  also varies. It is measured on voltmeter connected across armature. No Load is connected to machine, hence characteristics are also called no load characteristics which is graph of E o  against field current I f as sho...
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