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GATE 2018 Physics (PH) Answer Key, Question Paper & Analysis

Last Updated - February 04, 2018

IIT Guwahati have successfully conducted GATE 2018 Physics (PH) on Feb 4.The questions asked in the Physics (PH) were conceptual on subjects like EMT, Quantum Mechanics, and Mathematical Physics. GATE marks are distributed for each section. 70% of the marks cover the core subject, i.e., Physics Engineering for this GATE Exam.

  • Physics involved around Linear vector space; matrices; vector calculus; linear differential equations; elements of complex analysis.
  • Mostly questions are basics, fundamental, concept based and thought-provoking. Check GATE PH Paper Analysis
  • The official answer keys are referred for evaluating GATE Scores. Based on official answer keys, the result is declared.
  • GATE 2018 Result will be declared by March 17, 2018

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How to Download GATE 2018 Answer Key?

  1. Candidates have to log into the GATE Online Application Processing System (GOAPS) by submitting their enrolment ID and password which was given at the time of registration.
  2. Click on the "View Response" tab.
  3. A PDF will appear on the screen which would have the candidate’s details and answers to each question asked in the GATE 2018 paper.
  4. Click on the link given on this page.
  5. Check the Instrumentation Engineering and download the relevant answer key.
  6. After downloading the answer key and save the file.

How to challenge GATE 2018 Answer Key?

  1. Log into GATE Online Application Processing System.
  2. Go through the guidelines given carefully.
  3. Agree by checking on declaration stating that guidelines for the candidates of the GATE Answer Key have been understood.
  4. Click on the “Contest Answer Key" tab to be able to pay and mail objections related to the answer.
  5. INR 500 has to be paid through the online portal provided for every question which has to be challenged.
  6. NRI candidates of GATE will have to pay US $ 10 per question being challenged.
  7. It is important to use the correct question number given in the question paper to challenge.
  8. Attach a justified proof for challenging the answer key.

GATE 2018 Physics (PH) Paper Analysis

General Aptitude: This section was mandatory. General Aptitude (GA) section comprised 10 questions. 5 questions out of these will carry 1 mark each, while the remaining 5 shall carry 2 marks each, for a total of 15 marks.

Engineering Mathematics section: This section was also compulsory.

Subject-specific section: This section comprised 70% of the exam paper.

Overall Difficulty Level

The difficulty level of the examination was between moderate and easy level. The total number of questions were not too much, thus running out of time was not a common problem among test takers. The problems were usually formula based, requiring little to no calculation.

Types of Questions

Multiple Choice Questions (MCQs)

These questions are objective type with each having a set of four options, out of which one is the correct answer. They carry 1 or 2 marks each in all papers and sections.

Numerical Answer Type (NAT)

Similar to MCQs, each question carries either 1 or 2 marks. The answers to these questions are usually numbers which the candidate has to enter using a mouse and virtual keyboard. The answer can be either an integer or a number with decimals or even a decimal number. The candidate will not be given any choices for these questions.

Marking Scheme

  • For 1-mark MCQs, 1/3 mark will be deducted for every incorrect attempt.
  • In case of 2-mark MCQs, the candidate will be penalized 2/3 mark for the wrong attempt
  • For questions that aren’t attempted, zero marks will be awarded.
  • There was no negative marking for numerical answer type (NAT) questions

GATE Cut off 2018

The expected cut off marks for GATE 2018 Physics examination are given below:

Test Paper CodeQualifying MarksOrganizing Institute
Physics (PH)383228

GATE Physics (PH) Previous Year Paper Analysis

The table below explains how much weightage each topic from GATE physics had for the previous years. GATE 2018 Physics aspirants are advised to go through the table, so as to understand the distribution of marks among the different units.

UnitNumber of questions
1 mark2 marks1 mark2 marks1 mark2 marks
Mathematical Physics325222
Classical Mechanics252633
Electromagnetic Theory443234
Quantum Mechanics273338
Thermodynamics and Statistical Physics323343
Atomic and Molecular Physics22-441
Solid State Physics332341
Nuclear and Particle Physics422223
General Aptitude555555



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