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CSS past paper

CSS Physics Paper I Past Paper 2021

CSS Physics Paper I 2021 carries 100 marks over 3 hours. It has 7 questions.

Marks
100
Time
3 hours
Questions
7

Years

How to attempt: Attempt ONLY FOUR questions from PART-II. ALL questions carry EQUAL marks.

Questions

Question 1 (Part I) is the paper's MCQs, which are not reproduced here.

  1. Q. 2
    (20)
    • (a)
      Describe Einstein postulates of special theory of Relativity. Express the difference between the special and the general theories of Relativity.
      (10)
    • (b)
      Establish the energy-mass relationship and give its significance.
      (10)
  2. Q. 3
    (20)
    • (a)
      Differentiate between Fermi-Dirac, Bose-Einstein and Maxwell Statistics. Give application of each.
      (10)
    • (b)
      Draw a labelled diagram of a nuclear reactor and give significance of each part.
      (10)
  3. Q. 4
    (20)
    • (a)
      Distinguish between the linear and angular momentum. Express Newton’s second law in terms of the linear and angular motion.
      (10)
    • (b)
      Discuss the acceptor and rejecter electronic circuits.
      (10)
  4. Q. 5
    (20)
    • (a)
      Describe and explain the Miller indices. Recognize the symbols <111>, [010], (111).
      (10)
    • (b)
      Discuss the closest packed crystal structures.
      (10)
  5. Q. 6
    (20)
    • (a)
      Can you imagine a three dimensional diffraction grating? Describe in detail.
      (10)
    • (b)
      Justify the dual nature of light with elaborative examples.
      (10)
  6. Q. 7
    (20)
    • (a)
      State and explain the three laws of Thermodynamics.
      (10)
    • (b)
      What is a heat engine? Determine the efficiency of the engine if it takes 10,000 J of heat and delivers 2000 J of work per cycle.
      (10)
  7. Q. 8
    Write notes on any TWO of the following: (10 each)
    (20)
    • (a)
      Mickelson-Morley experiment and its latest usage in a recent Nobel award.
      (10)
    • (b)
      Unification of forces and Abdus Salam contribution.
      (10)
    • (c)
      An essay on Large Hadron Partical Accelerator.
      (10)
  1. Part-II is to be attempted on the separate Answer Book.
  2. Attempt ONLY FOUR questions from PART-II. ALL questions carry EQUAL marks.
  3. All the parts (if any) of each Question must be attempted at one place instead of at different places.
  4. Write Q. No. in the Answer Book in accordance with Q. No. in the Q.Paper.
  5. No Page/Space be left blank between the answers. All the blank pages of Answer Book must be crossed.
  6. Extra attempt of any question or any part of the question will not be considered.
  7. Use of Calculator is allowed.