Blog for IAS aspirants

Strategy For Electrical Engineering

In Uncategorized on June 21, 2012 at 23:30

For Electrical Engineering, I personally feel that Prakash Rajpurohit Sir’s (AIR-2 in CSE-2009) blog has all the required information that one needs to know. In fact that is the main reason why I am so late in writing a post on Electrical Engineering. I did not feel the need to provide any extra information other than what was mentioned on his blog.For the book list, please refer to:

The unit-wise strategy can also be found at Prakash Sir’s blog (

Below, I am reproducing his strategy along with some additions of my own.

Paper – I

  1. Circuit Theory: This topic requires continuous practice. One should solve as many numericals as you can from A. Chakrabarti.  Even though I couldn’t do it due to paucity of time but solving IES papers may help.
  2. Signals and systems: In this topic, one must remember the formulas by making a formula sheet. As Prakash Sir has mentioned, for DFT/FFT, refer to Oppenheim’s book on DSP.
  3. E.M. Theory: Read chapter 6(till 6.29), 7 and 8 from K.D. Prasad. Practice some numerical examples. Sometimes the book solves them in a long way, but you must do them in the shortest way possible. For Smith chart and impedance matching refer Jordan & Balmain. Make the list of formulas and practice all the derivations.
  4. Analog Electronics: Diode, Transistors and Amplifiers can be done from any book. Topics that are to be covered from JB Gupta are: Oscillators, Op Amp, Wave shaping circuits, Multivibrators, Waveform Generators and Power supplies. You will have to practice numerical from IES papers since JB Gupta doesn’t have many numerical. Also, in this chapter practice derivations well and make sure you do not do mistakes in symbols.
  5. Digital Electronics: I referred to R.P. Jain for this topic. It is a very good book that covers all the concepts and also provides sufficient numerical practice. Please stick to the syllabus while reading this book.
  6. Energy Conversion: Try to cover everything given in the syllabus from Ashfaq Hussain and make good command over all the numerical given in the book. It covers topic from IES point of view. Do all the questions asked in the IES exams thoroughly.
  7. Power Electronics and Electric Drives: Topics to be covered are Chapter 2(characteristics of diode, BJT, MOSFET, IGBT), chapter 4-Thyrister(complete), chapter 5 – Thyrister commutation techniques (complete), chapter 6 –Phase controlled rectifiers(Leave dual converters), chapter 7- Choppers(Leave Thyrister Chopper circuits and multiphase choppers) , chapter 8 –Inverters(Leave force-commutated thyrister inverters, current source and series inverters) and chapter 12-electric drives(complete). Cover all the derivations (like deriving expressions for particular type of rectifier or inverter) as well as working of circuits. Note that this book can be difficult to read at first due to extensive coverage of topics. But you must nevertheless go through it. At first, focus on the concepts. You may leave the numericals at the back of the Chapters since there are sufficient solved examples in the book. Do not just read the examples, solve them yourself.
  1. Analog Communication: Cover chapter 4(AM) and Chapter 5(on FM and PM) from BP Lathi. Random process(chapter 1) can be covered from Haykin. And Noise(chapter 4) can be covered from Singh and Sapre. Also cover AM AND FM practical modulation and demodulation circuits from Singh and Sapre.

Paper II

  1. Control Systems: Nagrath and Gopal is sufficient for all the topics. Practice from previous year IES and CSE papers. Please stick to the syllabus. There is no need to read the entire book.
  2. Microprocessors and Microcomputers: Cover chapters 1 to7 and 9, and parts of chapter 8 and 10(from which questions has been asked in IES exams), In peripherals cover 12, 14, 15, 16 (Focus more on whatever has been asked in IES papers).
  3. Measurement and Instrumentation: Cover all the instruments given in the syllabus thoroughly from the Sawhney. Here also guide will be IES questions. In this book, you may skip the numericals at the end of the Chapter if you have less time because it has sufficient solved examples. Focus on derivations of different formulae. Also note the drawbacks of each measuring instrument. For oscilloscope, please do not forget to practice making schematic diagrams.
  4. Power Systems: I did this topic from Ashfaq Hussain. It covers the entire syllabus. You may have to read a bit more on the last Chapter. Solve all examples and questions at the back of the Chapters. Do not forget to practice the flowcharts of optimization schemes for load distribution.
  5. Power System Protection: Chapters of Protective relays and circuit breakers (from Wadhwa) cover large part of the syllabus in much better way. For microprocessor based relays refer to TMH book. You may also refer to the TMH book for other parts of the syllabus too in addition to Wadhwa. Do solve the questions at the end of the Chapters.
  6. Digital Communication: For PCM, DPCM, DM refer to chapter 6 of Lathi. ASK, PSK and FSK are covered much better in Haykin. Information theory and codes can be covered from either of them. Chapter 1 and 2 of Forouzan are to be covered for data networks and 7 layered architecture.

Basically in Electrical Engineering, practice numericals and revise your derivations well. Do not forget to memorize the advantages and disadvantages wherever relevant for answering theoretical questions. When you write answers always, mention which symbols stand for what and express your answers in correct units.

  1. Where can I find solved previous ias electrical papers.. is there any source available ..

  2. Hello sir,
    I see the thread seem to appear dormant now, but it would be wise of you clearing some of my doubts regarding EE optional for CSE 2017. I was surprised to see the thread when you took suggestions and were perturbed after your first attempt and seeking to meet muthyala Raju sir.. Kindly respond.

    1) I am neither of any IIT/NIT nor i was very good in academics, and when I see the results, all the successful candidates seem to appear a veteran in some or other way. So would you recommend me choosing EE optional. The plus with me is if I study any book with my pace ,I can cover it properly.

    2) I would need some guidance with the subjects and I feel if coaching would be helpful. So is there any body in delhi or any individual professor who can help me clearing my doubts.

    If you respond, I would be able to gear in the direction as that would be directly from princedhawans brain.

  3. electrical engg student gate m maths optional sub l skte h ky ?

  4. Do we need to do the unsolved questions of Signal and system by oppenheim and wilsky or the solved one are sufficient ?

  5. Thank you so much for replying.
    Would it be possible for you to put the topic wise strategy for power system and control system.

  6. Sir
    book you have mentioned for powersystem is it electrical power systems by ashfaq hussain ,or with some other name

  7. Heartiest congratulations to you on your splendid success and words of appreciation for your noble cause of helping future aspirants.
    It would be very helpful if you can provide topic wise strategy for control system and power system as given for power electronics.
    I also need to ask that whether selective study can be done in case of electrical.
    I haven’t studied signal system, EM theory and communication system as they were not in our curriculum. Is it fine to appear the exam without studying these subjects ?
    Being in job i can’t opt for any coaching. I they are absolutely necessary, being a novice in these subjects, what could be the right approach for these subjects.

  8. Sir
    I have done my engineering in EEE To attempt 300 marks should we study all the chapters
    like Analog Communication, Digital Communication and Microprocessors and Microcomputers compulsory, as i dont have enough knowledge on this.

  9. If i am writing mains exam in English medium then am i bounded to face interview in English medium or if i wish i can change?

  10. Hello Sir,

    Congrats on your success!
    I am in final year of with mechanical engineering from IIT Delhi itself.
    I am willing to take mechanical engineering as a optional subject for civil services preparation. But I was worried about the syllabus as it is very large.
    Also, while preparing for electrical, did you take any coaching or guidance program?, or is the coaching necessary for preparing engineering subjects because there are not many coaching programs for these subjects!

    Please guide me through it, how should I prepare for mechanical engineering?

    • There was no coaching for Electrical for IAS exam. Coaching is not necessary. it only guides you during your preparation. Since, I did not have mechanical engg, as a subject, I can’t help you much more than this.

  11. sir ,can u guide me for prelims (books and strategy that u have followed).my optional are electrical and maths and i m ok with it but i m confused for gs so pls guide me sir. what is vajiram yellow book ,is it classroom printed material or correspondence material.sir i m thinking to go for vajiram correspondence material.sir it is ok or should i follow the books.what is expected cut off for prelims?

    sir congrats for ur success.and thanks for such a useful blog.i think society needs officers like u, prakash sir ,anay sir and so many other blogers which help students like us and i sure u will do the same to public when u come to field. HATS OFF SIR. THANKS FOR HELPING US.

    • Printed material of Vajiram comes in the form of yellow books that are available in the market for sale.
      For books on GS please refer to the GS post.
      Thank you for your kind words of appreciation.

  12. sir
    how many marks u scored in electrical
    is it need to all question.?

  13. are we bounded to take the same medium in written examination and interview?

  14. Heartiest congratulations Prince for achieving this feat. You have made all of us proud. Very happy to see that you are trying your best to help out the future aspirants with your own experience. God Bless you and I m certain who will make the whole country feel proud one day.

  15. Sir,
    I want to take maths as a subject but every one is giving negative feedback regarding it and insisting to take subject from humanities, so can you please guide me in this issue.

  16. In the analysis of the Electrical Papers for the past years, it can be observed that one can attempt questions from the point of view as communication engineer and leave power systems part (except for one or two questions in the compulsory questions part).
    And similarly leave the communication part and take only electrical part with power systems. Where you aware of this strategy before exam or did you attempt in a similar way? What are your views on such a strategy?

  17. hiii..thank you vry much for sharing information& supporting. congrats for your sucess. i am from kolkata whre there is no such good coaching centre available or good study materials. i am working in a govt job here bt being a IAS my childhood dream. Pl suggest me that my dream will fullfilled staying calcutta and how will i get study materials?pls sir help me

    • You can crack the exam while staying anywhere. But you have to come to Delhi in between for getting some study material. Rest of the things such as newspapers and magazines are available everywhere in India.

  18. Sir,
    In digital electronics,from where you had studied FPGA .Also,please post your interview strategy .

  19. Sir,thanx a ton for your suggestion.
    Sir which other books you have followed for machines along with ashfaq in your btech years and also for CSE preparation.

    • You may practice numericals from Nagrath and Gopal. But Ashfaq is sufficient and I relied heavily on it for Machines. You can also use IES Made Easy practice material and do old IAS/IES question papers.

  20. Sir heartiest congratulations to you for your marvellous achievement.
    Sir i just wanna know that rather than Ashfaq which book should be followed for machines,that will be handy for other exams like GATE, ESE etc.

  21. It would be of great help if u can post a strategy for philosophy as well as political science…Thank u

  22. Sir,
    I have done BE in instrumentation from thapar university. I have not studied “1. Electrical Machines” , 2. Power System and Power system protection, 3. Communication systems. With rest of the syllabus of EE, I am comfortable. I came to know that each of these three subjects will take one month approx. to prepare fully and I am not sure whether even then I will be able to cope up with these subjects or not.
    As these three are main subjects . So, I am also thinking to go for Public admin instead of electrical eng. I have completed coaching of GS and prepared second optional and have to appear in CS-2013.
    Kindly guide me.

  23. Sir,
    Could you reveal your marks in CSE11. Sir I passed engineering in 2012 in ECE streem & preparing for CS . My one optional is geography & I am in dilemma whether to choose electrical engineering or public administration as 2nd optional.Sir kindly suggest me.

    • These are two very different Optionals and you need to decide whether you would comfortable in handling science subjects since they usually require a lot of practice and their syllabi are a little large.
      Even arts subjects have their own difficulties and challenges when it comes to concise answer writing and memorizing facts. So the choice is yours.

  24. is calculator allowed during exam of subject like maths or engineering paper?

  25. Thanks for the reply

    For Energy Conversion can you please tell me the book title.

  26. Hi Prince
    Congrats for the great success.

    Can you please tell me from where I can get previous 10 year IAS mains papers of Electrical Engineering

    • New Vishal Publications brings out the previous years question papers for all subjects. They will be unsolved. Solved papers for IAS Elec Engg are not available to the best of my knowledge.

  27. Sir,congrats for your success.kindly tell me the process to maintane time management and improoving writing skill.thanks

  28. Sir,
    Could u please tell us the best book to cover the beginning portions of Analog Electronics such as Diodes, BJT, MOSFET, JFET, Amplifiers,biasing etc? Boylestead seems to be insufficient and Sedra Smith tends to go in too much of details. Please opine

    thanks in advance

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