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FPSC · CSS 2021

Physics, Paper I

100 marks · 3 hours · 7 questions
This paper Physics · all yearsQ. 2 · Describe Einstein postulates of special…Q. 3 · Differentiate between Fermi-Dirac, Bose-Einstein and…Q. 4 · Distinguish between the linear and…Q. 5 · Describe and explain the Miller…Q. 6 · Can you imagine a three…Q. 7 · State and explain the three…Q. 8 · Write notes on any TWO…With this paper← 20202021 →
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Part II

Q. 2
  1. (a)Describe Einstein postulates of special theory of Relativity. Express the difference between the special and the general theories of Relativity. [10]
  2. (b)Establish the energy-mass relationship and give its significance. [10]
(20)
Q. 3
  1. (a)Differentiate between Fermi-Dirac, Bose-Einstein and Maxwell Statistics. Give application of each. [10]
  2. (b)Draw a labelled diagram of a nuclear reactor and give significance of each part. [10]
(20)
Q. 4
  1. (a)Distinguish between the linear and angular momentum. Express Newton's second law in terms of the linear and angular motion. [10]
  2. (b)Discuss the acceptor and rejecter electronic circuits. [10]
(20)
Q. 5
  1. (a)Describe and explain the Miller indices. Recognize the symbols <111>, [10]
  2. (b)Discuss the closest packed crystal structures. [10]
(20)
Q. 6
  1. (a)Can you imagine a three dimensional diffraction grating? Describe in detail. [10]
  2. (b)Justify the dual nature of light with elaborative examples. [10]
(20)
Q. 7
  1. (a)State and explain the three laws of Thermodynamics. [10]
  2. (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]
(20)
Q. 8

Write notes on any TWO of the following:

  1. (a)Mickelson-Morley experiment and its latest usage in a recent Nobel award. [10]
  2. (b)Unification of forces and Abdus Salam contribution. [10]
  3. (c)An essay on Large Hadron Partical Accelerator. [10]
(20)

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About this paper

The 2021 CSS Physics paper set by the FPSC. Question wording only; questions marked “Not yet checked” have not been compared with the official paper yet.

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