Engineering Services Exam 2017 Electronics & Telecommunication Paper I PDF

Central Government Jobs Engineer 2017

  • Year 2017
  • Conducted By UPSC
  • Maximum Marks 300
  • Duration Three Hours
  • Languages English

Exam Details

Detail Information
Examination ENGINEERING SERVICES EXAMINATION (Mains)
Year 2017
Conducting Body UPSC
Paper Electronics and Telecommunication Engineering Paper - I
Subject Electronics and Telecommunication Engineering
Duration Three Hours
Maximum Marks 300
Question Type Mixed

This is the official question paper for the Engineering Services Examination (Mains) 2017, Paper I, for Electronics and Telecommunication Engineering, conducted by UPSC. The paper carries a maximum of 300 marks and is to be completed within three hours. It consists of eight questions divided into two sections, with candidates required to attempt five questions in total, including compulsory questions 1 and 5, and at least one from each section. This paper is crucial for aspirants preparing for the ESE Mains exam, providing insights into the types of questions, marking scheme, and difficulty level.

Major Topics Covered

  • Semiconductor Physics
  • Band Diagrams
  • Wave Functions
  • Fermi Energy
  • Conduction Electrons
  • Common Source Amplifier
  • Voltage Gain
  • Lumen
  • Candela
  • Visible Light Bandwidth
  • NAND Gates
  • Digital Logic Design

Why This Paper is Important

  • Useful for ENGINEERING SERVICES EXAMINATION (Mains) preparation
  • Helps understand the latest exam pattern
  • Useful for practice and self-assessment
  • Covers frequently asked General Studies topics
  • Helpful for analysing question trends

Related Resources

  • ESE 2016 Electronics and Telecommunication Engineering Paper I
  • ESE 2018 Electronics and Telecommunication Engineering Paper I
  • ESE 2017 Electronics and Telecommunication Engineering Paper II
  • ESE 2017 Mains Electronics and Telecommunication Engineering Answer Key
  • ESE Electronics and Telecommunication Engineering Syllabus
  • ESE Mains Exam Pattern
  • Engineering Services Examination (Prelims)
  • GATE Electronics and Communication Engineering

Instructions

  • Answers must be written in ENGLISH only.
  • There are EIGHT questions divided in TWO sections.
  • Candidate has to attempt FIVE questions in all.
  • Questions no. 1 and 5 are compulsory and out of the remaining, THREE are to be attempted choosing at least ONE question from each section.
  • The number of marks carried by a question / part is indicated against it.
  • Wherever any assumptions are made for answering a question, they must be clearly indicated.
  • Diagrams/figures, wherever required, shall be drawn in the space provided for answering the question itself.
  • Unless otherwise mentioned, symbols and notations carry their usual standard meanings.
  • Candidates should attempt all questions in the space prescribed under each question in the Question-cum-Answer (QCA) Booklet.
  • Any answer written outside the space allotted may not be given credit.
  • Attempts of questions shall be counted in sequential order.
  • Unless struck off, attempt of a question shall be counted even if attempted partly.
  • Any page or portion of the page left blank in the Question-cum-Answer Booklet must be clearly struck off.
  • Values of constants which may be required : = -1.6 \times 10^{-19} Coulomb Electron charge = 4\pi \times 10^{-7} Henry/m Free space permeability = (1/36\pi) \times 10^{-9} Farad/m Free space permittivity 3 \times 10^8 m/sec Velocity of light in free space = 1{:}38\times10^{-23}\ \mathrm{J/K} Boltzmann constant 6.626 \times 10^{-34} J-s Planck's constant

Questions (page 2)

Section A

Q1.

(a) In a long semiconductor bar (EG = 2 \text eV), conduction band electrons come in from the left in the positive x-direction with a kinetic energy of 3 eV. They move from location A to B to C to D. Between A and B, the electric field is zero; between locations B and C, there is a linearly varying voltage increase of 4 V; between C and D, the field is again zero. Assuming no scattering, sketch a simplified band diagram describing the motions of these electrons. Assuming that these electrons can be described as plane waves, with a free-electron mass, write down the wave function of the electrons at location D. Leave your result in terms of an arbitrary normalization constant. Assume the mass of free electron to be 9.11 × 10-31 kg.

(b) Calculate the Fermi energy EFO at 0°K for copper and estimate the average speed of the conduction electrons in Cu. The density of Cu is 8.96 gm/cm3 and atomic weight is 63.5. Given Avogadro's number is 6 × 1023.

(c) In the common source amplifier shown, evaluate voltage gain Av given RD = 2.7 k\Omega, μ = 50 and rds = 25 k\Omega. Derive the expression used.

(d) Define lumen and candela. The wavelength of visible light ranges from violet at approximately 380 nm to red at 720 nm. Obtain the bandwidth available of visible light.

(e) Implement the following expression using NAND gates only : Y = (a + c) (\overlinea + b + c)

Question paper preview

Scanned pages 1–2 for reference. Download the official PDF for the full paper.

Page 1
UPSC Engineering Services Examination (Mains) 2017 Electronics and Telecommunication Engineering Paper I page 1 instructions scan PDF download
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UPSC Engineering Services Examination (Mains) 2017 Electronics and Telecommunication Engineering Paper I page 1 instructions scan PDF download

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Frequently asked questions

What is the name of the exam?

The exam is the ENGINEERING SERVICES EXAMINATION (Mains) 2017.

Which paper is this question paper for?

This is Paper I for Electronics and Telecommunication Engineering.

What is the conducting body?

The conducting body is UPSC.

What is the maximum marks for this paper?

The maximum marks for this paper are 300.

What is the time allowed to complete the paper?

The time allowed is Three Hours.

In which language should the answers be written?

Answers must be written in English only.

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