UPSC Engineering Services 2020 Electrical Engineering Paper I PDF

Central Government Jobs Engineer 2020

  • Year 2020
  • Conducted By UPSC
  • Questions 8
  • Maximum Marks 300
  • Duration Three Hours
  • Languages English

Exam Details

Detail Information
Examination Engineering Services (Main) Examination
Year 2020
Conducting Body UPSC
Paper Electrical Engineering Paper - I
Subject Electrical Engineering
Duration Three Hours
Maximum Marks 300
Number of Questions 8
Question Type Mixed

This is the question paper for the UPSC Engineering Services (Main) Examination 2020, specifically for Electrical Engineering Paper I. Conducted by UPSC, this paper carries a maximum of 300 marks and allows three hours for completion. It is designed to assess the in-depth knowledge of candidates in various aspects of Electrical Engineering. Aspirants can use this paper to understand the exam structure, question types, and difficulty level, aiding their preparation for future examinations. The paper consists of eight questions divided into two sections, with specific instructions on compulsory questions and section-wise choices.

Major Topics Covered

  • Partial Differential Equations
  • Surfaces of Revolution
  • Hysteresis in Ferromagnetic Materials
  • Continuity of Current Equation
  • Conservation of Charge
  • Superposition Principle
  • Ampere's Circuital Law
  • Magnetic Field (H)
  • Eigenvalues
  • Diagonalization of Matrices
  • Quadratic Forms
  • Specific Resistance
  • Conductors, Semiconductors, Insulators
  • Insulation Resistance of a Cable

Why This Paper is Important

  • Useful for Engineering Services (Main) Examination 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

  • UPSC Engineering Services (Main) Examination 2019 Electrical Engineering Paper I
  • UPSC Engineering Services (Main) Examination 2021 Electrical Engineering Paper I
  • UPSC Engineering Services (Main) Examination 2020 Electrical Engineering Paper II
  • UPSC Engineering Services 2020 Electrical Engineering Paper I Answer Key
  • UPSC Engineering Services Electrical Engineering Syllabus
  • ESE Mains Electrical Engineering Paper I Syllabus
  • UPSC Engineering Services Exam Pattern
  • ESE Mains Exam Pattern

Instructions

  • 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 have their usual standard meanings.
  • 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.
  • Answers must be written in ENGLISH only.

Questions (page 2)

Section A

Q1.

(a) (i) Obtain the partial differential equation governing the equations f(u, v) = 0, u = x + yz, v = x + y + z
(ii) Construct a partial differential equation of all surfaces of revolution having z-axis as the axis of rotation.

(b) Discuss the phenomena of Hysteresis in ferromagnetic materials. On the B-H curve show the retentivity, coercivity and saturation points. What is coercive force and the energy dissipated per unit volume of the ferromagnetic substance during the hysteresis cycle?

(c) Explain and derive continuity of current equation using the principle of conservation of charge.

(d) Using the principle of superposition, determine the current I in the 5 \Omega resistor in the circuit shown in the figure. 1 - 5Ω ≶ 20 \Omega 30 V ξ 10 \Omega 6A 15~Omega

(e) State Ampere's circuital law. A hollow conducting cylinder has inner radius a and outer radius b and carries current I along the positive z-direction. Find H everywhere.

Section A

Q2.

(a) (i) If a square matrix A of order n with entries in field F has n distinct eigenvalues, then prove that matrix A is similar to a diagonal matrix.
(ii) Find the matrix P which diagonalizes the matrix associated with the quadratic form 3x2 + 5y2 + 3z2 - 2yz + 2zx - 2xy.

(b) (i) On the basis of specific resistance \rho, discuss the difference between conductors, semi-conductors and insulators.
(ii) Prove that insulation resistance of a cable is inversely proportional to its length. Define insulation resistance.

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Frequently asked questions

What is the name of the examination?

The examination is the Engineering Services (Main) Examination.

Which year is this question paper from?

This question paper is from the year 2020.

Who conducts the Engineering Services Examination?

The examination is conducted by UPSC (Union Public Service Commission).

What is the subject of this paper?

The subject is Electrical Engineering, Paper I.

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.

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