GATE Electrical 2015 Question Paper [Both sets] With Key

GATE-2015 [electrical]  was held in February month, GATE electrical was held in two batches with different papers. Below given are the GATE 2015 question papers in PDF Format. The answers provided in paper are by IIT . Going through these paper will help you in getting an overview of the patter. Some of you might find it tough but a little bit of reading and practice can fix it. Quality is little low but not that bad.

GATE electrical 2015 question paper set 1 by electrical selfie

GATE electrical 2015 question paper set 2 in pdf by electrical selfie

Electrical and Electronic Measurement, Instrumentation

This post contains hand written notes of Electrical and Electronic Measurement for GATE exam [This notes is also useful for other electrical entrance exams.

This note has around 200 pages. Below given are two  PDF file.

link 1: electrical and electronic measurement by electrical selfie

link 2: electrical and electronic measurement by electrical selfie

Best books for GATE 2015

Here are some of the best books for GATE 2015, though it must be said that you have to invest a significant amount of time in these books to get some thing good out of it. These text books can be used as a standard reference, when ever you have a doubt you can go through it. Reading is a good habit, takes time to develop but is essential to learning.

Electrical Machines

Electrical Machinery by P.S Bhimbra
Although a fine books but it can be a bit intimidating at the beginning, Plenty of examples have been given in between the chapters so no worries there. Solution manual not available for end of the chapter problems.

ELECTRIC MACHINERY, 6/E (English) 6th Edition (Paperback) by A Fitzgerald, Charles Kingsley, Stephen Umans

The above given books is a good read, though a few GATE topics are not covered,  solution manual for this books is available online which will help in self preparation.

Signal and Systems

Signals & System 2nd Ed (English) 2nd Edition (Paperback) by Alan V. Oppenheim, Alan S. Willsky, S. Hamid Nawab

You can close your eyes and go for this signals and systems book, topics are explained in very easy manner and complete solution manual is available online, good books for self preparation.

Control System

Automatic Control Systems (With Cd) (English) 8th Edition (paperback) byGolnaraghi Kuo

The above is a standard textbook in control system and its complete solution manual is available online, this textbook is little hard to understand but it has a good set of practice problem.

Control Systems Engineering (English) 6th Edition (Paperback) by Norman S. Nise

This textbook by Nise is very easy to understand and concepts are explained in a very lucid way. On the negative side questions given in practice problems are more suited for the mechanical students. This books complete solution manual is available online

Electrical Measurement

A Course in Electrical and Electronic Measurements and Instrumentation (English) (Paperback) by A. K. Sawhney

A good books as a reference for measurement but its physically huge size is a negative, very few explanation problems and no solution manual for the end of the chapter problems.

Digital Design

DIGITAL DESIGN, 5TH EDITION (English) (Hardcover) by M. Morris Mano, Michael D. Ciletti

Although the above is a standard textbooks it is little difficult to understand. Its complete solution manual is available online.

It will be better to use easy Indian textbooks for this subject.
This is the best book for circuit analysis, easy to understand, ample example problems, complete solution manual is available online.
EDC by Boylestad is easy to understand and it complete solution manual is available online,  a must read book.
This books is a good read, lots of in chapter explanation problem, no solution manual available. Good book can be used a reference.
Very few in chapter examples, also very few end of the chapter practice problem, over all it can be used as a reference books.
Best book, with complete solution manual available online
Although recommended by many as the standard textbook for mathematics, this is little difficult to understand but complete solution manual of this book is available online.


These books have been recommend keeping in mind the quality and also the fact that solution manual for these books are available online so that it will be easier for people to prepare for GATE 2015 electrical all by themselves.

Z-transforms notes for GATE


It is  an easy topic in mathematics when compared to complex variables and calculus. All that you need to do is practice it a bit.

z transform notes type A pdf

Transform Theory is one of the subjects of GATE electrical exam, This subject includes Fourier transform,Laplace transform, Z-transform. So keep in mind that if you are preparing for Z-transform then you will have to prepare other two sub-topics also.

Anyhow Fourier, Laplace and Z-transform are integral parts of electrical engineering so don’t miss them, a little bit of practice will help you a long way.

This is small z-transform notes of 25 pages for all of you who are preparing for GATE exam.

Topic Covered

  • Z-transform definition
  • Region of convergence
  • Recurrence relation
  • First shifting theorem
  • Convolution property and initial value theorem
  • Inverse Z-transform
  • Partial fraction

Stay tuned for more GATE electrical notes and other material.

Calculus: Improper definite integrals notes

This post contains pdf file of the written notes of improper definite integrals which is part of calculus.

Calculus improper definite integrals type A

So this is another installment of Engineering Mathematics subject. When you are doing self preparation GATE/IES electrical exams, mathematics is a very a important subject. This is also relatively easy to understand and cover. All you have to do is to put in a little bit of effort. Aptitude and mathematics combined give you a total of 30 marks. 30 easy marks, you cannot afford to miss this.

You cannot afford to be weak in mathematics. Mathematics is used in almost all other subjects, even if you are power electronics, you need integrals[mathematics] to integrate the equation to find the average voltage or average current. So put in special effort for mathematics.

Topic covered in this post.

  • Gamma and Beta function.
  • Length of the curve
  • Partial differentiation : Function of two variable
  • Continuity
  • Homogeneous function
  • Euler’s theorem
  • Second order theorem
  • Derivative of composite function
  • Maxima and minima of a function

Stay tuned for more.

Synchronous Machines note Part 3/4

Gate 2015 notification is out and GATE exam forms will be out from September 1.  So it is right time to start preparing for the exam.

part 3/4 of synchronous machine type A pdf file

This is 3rd part of the four part series of synchronous machine notes. Electrical machine has a vast syllabus so it will be good to start it early. These notes are for all those who want to self prepare for GATE exam. Electrical Machine is difficult subject and these notes will help you going a long way in GATE preparation. You must also take help of the NPTEL, a large number of videos and notes on electrical machine.

Topics covered in this pdf

  • open circuit characteristics
  • external load control
  • compounding characteristics
  • short circuit ratio
  • two reaction theory
  • reluctance power, power flow in alternator, synchronizing power
  • synchronizing methods
  • two alternators in parallel / parallel operation
  • effect of changes in excitation
  • principal and operation of synchronous motor
  • Lots of solved problems

Stat tuned for more

Lapalace trasform notes

This is a Laplace transform notes for GATE/IES and similar electrical engineering examination.

laplace transform type A pdf

Laplace transform is very important considering the fact that it is widely used in other electrical engineering subjects like ‘signal and systems’, ‘control system’ and ‘electric circuits’.

So make sure that you don’t miss Laplace transform otherwise you will be missing a lot of action in other subjects.

Topic covered

  • Linearity property
  • shifting and scaling properties
  • Laplace transform of derivatives, periodic functions, unit step functions
  • improper function
  • Inverse Laplace transform
  • Initial value theorem.
  • Lots of solved problem on the above topics.

stay tuned for more

Complex variable notes

Complex variable PDF has been added in this post. This is a small study material of 37 pages. Complex variable obviously involves complex numbers and lots of calculus. This study material is useful for almost all kind of electrical entrance exams where this subject is involved.

complex variable-typeA PDF file

Topic covered

  • Modulus of complex number
  • Complex function
  • Analytic function
  • singularity
  • harmonic conjugate
  • complex i integration
  • Taylor’s theorem
  • Laurent’s series
  • residue

Stay tuned for more


Linear algebra notes

This part contains a pdf on linear algebra, Linear algebra is probably the easiest topic in engineering mathematics so don’t miss it. This is a small hand written note for various electrical engineering entrance examinations like GATE/IES, NTPC etc.

Linear algebra type:A PDF file

Topic covered

  • Determinants, types of matrix, elementary operations
  • inverse, co factor
  • rank, Augumented matrix
  • Solution of system and linear equations
  • Eigen values, Eigen vectors,
  • Cayley Hamilton theorems
  • Solved problems on the above topics.

Stay tuned for more

Synchronous Machines note Part two

This is second part of the Synchronous machine notes. This part is another step in making the GATE/IES preparation easily and freely available for electrical engineering students.

Synchronous Machine Part 2 pdf file – Type A

This part starts with an explanation on concentrated winding, how to remove nth harmonics, sample problems.

Then there are advantages of star connected armature, phase spread and few more problems.

Harmonics is explained in detail, why there is harmonics, types of harmonics and how to get rid of it.

Rotating magnetic field and production of torque is explained next, explanation on synchronous speed, torque, armature reaction and lots of problems.

Voltage regulation is explained at the end.

Stay tuned for more.

Synchronous Machines note Part one

This is first part of the 5 part synchronous machine notes series. This note is useful for electrical students who are preparing for GATE/IES exams.

synchronous machine part 1-Type:A

This note starts with the introductory note on DC/AC generator, then it moves to working principle of generator. Understanding how  flux work is very important in understanding how generator works, mutual flux linkages, induced emf follow etc.

Few small problems have been done to get a feeling of the concept.

Then this note explain construction of Salient Pole generator, cylindrical rotor alternator, armature winding, pole pitch, pitch factor etc.

This note as most of you electrical students know comes under electrical machine. E.M has a huge syllabus to cover and starting early will certainly help.

You can download,  print this note whatever but make sure that you do read it completely the day you download it or as soon as possible, try to analyze it, understand the small questions that are given.

Remember when you are preparing for a exam like GATE/IES you should either get serious about it or you should just leave it.


GATE electrical marks analysis

Q: So what does GATE electrical marks analysis shows us?

Ans: Well, the marks allocated for each subject changes each year, there is no defined pattern or marks allocated for each subject, except for the subject of general aptitude but since you need to have a general idea about the structure of the exam so that you can define your strategy for the exam please find the pdf file at the end of the post for the complete detailed structure of the GATE electrical marks pattern.

Q: What are the total marks for GATE?

Ans: The GATE exam is now conducted for 100 marks.

Q: How many many are allocated to general aptitude section

Ans: For the last few years aptitude section has been added and it is for 15 marks. This part is easy and a good place to score marks.

Q: How many marks are allocated to each question?

Ans: In GATE there are two types of question, 1 mark and 2 mark question.

Q: Is there negative marking?

Ans: Yes, each question has 1/3rd negative mark.

Q: How many marks should I get to qualify?

Ans: In GATE 2013, the qualifying mark for EE was 25 marks and a mark of 35 would have fetch you a rank of 9000, and mark of 27 around 19000 rank. You need 50+ for NIT and 60+ for IIT, this is for students in general category[ damm reservation].

Bottom line is that the GATE electrical marks analysis will show you that whatever subjects you are preparing prepare well and give equal importance to all of them because you never know the definite marks distribution, you may study a particular subject a lot and it may end up getting only 2 question.


You can download the pdf file below for details view of the GATE electrical mark distribution subject wise for last few years.

Subject wise marks analysis pdf