Physics Paper - II

Central Government Jobs Other Jobs 2017

  • Year 2017
  • Maximum Marks 200
  • Duration Three Hours Question Paper Specific Instructions Please Read Each Of The Following Instructions Carefully Before Attempting Questions. There Are Eight Questions In All, Out Of Which Five Are To Be Attempted. Question Nos. 1 And 5 Are Compulsory. Out Of The Remaining Six Questions, Three Are To Be Attempted Selecting At Least One Question From Each Of The Two Sections A And B. 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. All Questions Carry Equal Marks. The Number Of Marks Carried By A Question/part Is Indicated Against It. Answers Must Be Written In English Only. Unless Otherwise Mentioned, Symbols And Notations Have Their Usual Standard Meanings. Assume Suitable Data, If Necessary And Indicate The Same Clearly. Neat Sketches May Be Drawn, Wherever Required.

Exam Details

Detail Information
Examination Physics Paper II
Year 2017
Duration Three Hours Question Paper Specific Instructions Please Read Each Of The Following Instructions Carefully Before Attempting Questions. There Are Eight Questions In All, Out Of Which Five Are To Be Attempted. Question Nos. 1 And 5 Are Compulsory. Out Of The Remaining Six Questions, Three Are To Be Attempted Selecting At Least One Question From Each Of The Two Sections A And B. 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. All Questions Carry Equal Marks. The Number Of Marks Carried By A Question/part Is Indicated Against It. Answers Must Be Written In English Only. Unless Otherwise Mentioned, Symbols And Notations Have Their Usual Standard Meanings. Assume Suitable Data, If Necessary And Indicate The Same Clearly. Neat Sketches May Be Drawn, Wherever Required.
Maximum Marks 200

This page aggregates Physics Paper II for the Indian Forest Service Main Examination 2017, combining Page 1 metadata and instruction context with Page 2 repaired questions. It provides an exam overview (8 questions, two sections A and B, with Q1 and Q5 compulsory), time and marks (200 marks in three hours), and a list of useful constants. Page 2 delivers Section A questions and subparts 1.(a)–1.(e), 2.(a)–2.(c), and 3.(a)–3.(b), spanning topics from the uncertainty principle and hydrogen atom energy to Stern–Gerlach, Larmor precession, harmonic oscillator, particle-in-a-box problems, isotropic boxes, and angular momentum algebra (LS/jj coupling). The metadata includes FAQ-ready content, topics, keywords, and image SEO guidance to improve search visibility for central government exam resources. The page also supports structured schema types such as WebPage, FAQPage, and Quiz for enhanced SEO rendering.

Major Topics Covered

  • Uncertainty principle
  • Hydrogen atom binding energy
  • Wave function
  • Stern-Gerlach experiment
  • Larmor precession
  • Larmor frequency
  • Quantum harmonic oscillator
  • Classical oscillator
  • Particle in a 1D box
  • Energy eigenstates in 1D box
  • Limit of large L
  • Isotropic 3D box
  • Degeneracy of energy levels
  • Electron configurations
  • LS coupling
  • jj coupling
  • Orbital angular momentum
  • Spin and magnetic moments
  • Angular momentum algebra
  • LS and jj interactions

Why This Paper is Important

  • Useful for Physics Paper II preparation
  • Helps understand the latest exam pattern
  • Useful for practice and self-assessment
  • Covers frequently asked General Studies topics
  • Helpful for analysing question trends

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Instructions

  • There are EIGHT questions in all, out of which FIVE are to be attempted.
  • Out of the remaining SIX questions, THREE are to be attempted selecting at least ONE question from each of the two Sections A and B.
  • 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.
  • The number of marks carried by a question/part is indicated against it.
  • Answers must be written in ENGLISH only.
  • Unless otherwise mentioned, symbols and notations have their usual standard meanings.
  • Assume suitable data, if necessary and indicate the same clearly.
  • Neat sketches may be drawn, wherever required.
  • List of Useful Constants 1.673\times10^{-27} kg Mass of proton = 1.675 \times 10^{-27} kg = Mass of neutron 9.11 \times 10^{-31} kg = Mass of electron 6.626 \times 10^{-34} Js = Planck constant 1.380\times10^{-23} JK-1 = Boltzmann constant 9.273\times10^{-24} A m2 \qquad \qquad = Bohr magneton (\mu_{\rm p}) 5.051\times10^{-27} JT-1 (A m2) = Nuclear magneton (\mu_{N}) 1.602\times10^{-19} C = Electronic charge 1.660\times10^{-27} kg = Atomic mass unit (u) 931 MeV = = 1.00727u m(p) g_s^p = 5.5855 \mu_{N} m(^{4}_{2}He) = 4.002603 u = 1.00866 u m(n) m(^{87}_{29}Sr) = 86.908893 u m(^{12}_{6}C) = 12.00000 u m(^{3}_{1}H) = 3.0160500 \text{ u} m(^{2}_{1}H) = 2.014022 u m(^{16}_{8}O) = 15.999 u = 1.05 \times 10^{-34} Js ħ = 197 eVnm \hbar c

Questions (page 2)

Q1. 1. Use the uncertainty principle to estimate the binding energy of the hydrogen atom

Q2. 1.(a) in the ground state in terms of me, e, ħ and c. Estimate the answer in eV.

Q3. 1.(b) for x < 0 ; ψ
(x) = 0 ; = Ce^{-x}(1-e^{-x}) for x ≥ 0 where C is a constant. Find out the average position of the electron.

Q4. 1.
(c) What is the main inference drawn from the Stern Gerlach experiment? What would be the change in the result in the following cases:
(i) electron spin is 3/2ħ instead of ħ/2.
(ii) a beam of neutral atoms is passed through a homogeneous magnetic field.

Q5. 1.(d) What is meant by Larmour precession? Calculate the Larmour frequency for protons in a magnetic field of 1 Tesla.

Q6. 1.(e) Describe the differences in the behaviour of a quantum harmonic oscillator with the corresponding classical oscillator.

Q7. 2.(a) x = 0 and x = L. Obtain the allowed energy states of the particle and the corresponding eigenfunctions. What will be the energy pattern in the limit of L → ∞?

Q8. 2.(b) 5 lowest energy state. Estimate the probability of finding the particle between x = 0 and x = L/3.

Q9. 2.
(c) corresponding eigenfunctions of a particle in a three dimensional isotropic box of dimension L. What is the degeneracy of the first two excited states of the particle?

Q10. 3.(a) Consider two electrons system in (3p)'(4s)' configuration. Derive the allowed energy states of the system in
(i) LS coupling and
(ii) jj coupling; sketching the energy level diagram in each case. Name the interactions which are responsible for the different splittings.

Q11. 3.(b)
(i) \hatL × \hatL = i\hbar \hatL
(ii) [\hatL_ + , \hatL_-] = 2\hbar \hatLz
(iii) \hatσ_x \hatσ_y \hatσ_z = -i

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Frequently asked questions

What is the maximum marks for Physics Paper II?

200 marks.

How many questions must be attempted?

Five questions.

Which questions are compulsory?

Questions 1 and 5 are compulsory.

How many total questions are in the paper?

Eight questions in total.

What is the duration of the exam?

Three hours.

In which language must answers be written?

Answers must be written in English only.

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