univ.tifr.res.in GS Exam Physics-X Question Paper 2017 : Tata Institute of Fundamental Research

Name of the Centre :Tata Institute of Fundamental Research
Document type : Previous Question Papers
Name Of The Exam : GS Graduate School Admissions Exam
Name Of The Subject : Physics-X

Website : http://univ.tifr.res.in/admissions/
Download Previous Question Papers :
GS 2017 Physics-X : https://www.pdfquestion.in/uploads/13112-GS2017PHY_X.pdf
GS 2016 Physics-X : https://www.pdfquestion.in/uploads/13112-GS2016PHY_X.pdf
GS 2015 Physics-X : https://www.pdfquestion.in/uploads/13112-GS2015PHY_X.pdf
GS 2014 Physics-X : https://www.pdfquestion.in/uploads/13112-GS2014PHY_X.pdf
GS 2013 Physics-X : https://www.pdfquestion.in/uploads/13112-GS2013PHY_X.pdf
GS 2012 Physics-X : https://www.pdfquestion.in/uploads/13112-GS2012PHY_X.pdf

GS 2017 Physics-X Question Paper :

Duration : Three hours (3 hours)

Related : Tata Institute of Fundamental Research GS Exam Physics-Y Paper 2017 : www.pdfquestion.in/13109.html

Please Read These Instructions Carefully Before Attempting the Questions :
1. Please fill in details about name, reference code etc. on the answer sheet and question paper. Use only blue/black ballpoint pen. The Answer Sheet is machine –readable and will not read other colours.

2. This test consists of three parts: Section A, Section B and Section C. You must answer questions according to the programme you are applying for.
Section A has 25 questions : 1 – 15 are multiple-choice; 16 – 25 are numerical.
Section B has 15 questions : 26 – 35 are multiple-choice; 36 – 40 are symbolic.
Section C has 15 questions : 41 – 50 are multiple-choice; 51 – 55 are symbolic.

3. Indicate your ANSWER ON THE ANSWER SHEET as follows.
Multiple choice questions have four options (a), (b), (c) and (d), of which only one option is correct. Indicate the answers by filling up the bubble on the Answer Sheet corresponding to the correct option. If more than one bubble is filled in, it will be treated as not answered.

** Numerical questions have answers which are 3 (three) digit integers. Indicate the answers by filling in the corresponding bubbles on the Answer Sheet.
** Unless all three bubbles for a given question are filled, it will be treated as not answered. (See inside for details.)

** Symbolic questions have answers which are a number, a short formula or a word. Indicate the answers by writing in the boxes on the Answer Sheet next to the appropriate question numbers. (See inside for details.)

4. The marking for these questions shall be as follows.
5. Candidates are advised to mark the Answer Sheet only when they are sure of the answer. Till then, they may mark the answers on the question paper.
6. Rough work may be done on blank pages of the question paper. If needed, you may ask for extra sheets from the invigilators.

7. Use of scientific, non-programmable calculators is permitted. Calculators which plot graphs are NOT allowed. Multiple-use devices, such as cell phones, smartphones, etc. CANNOT be used as calculators.

8. Do NOT ask the invigilators for clarifications regarding the questions. They have been instructed not to respond to any such queries. In case a correction/clarification is deemed necessary, it will be announced in the examination hall.

9. A list of useful physical constants is given on the next page. Make sure to use only these values in answering the questions, especially those of numeric type.

Section A :
Q. 1 – 25 : to be attempted by ALL candidates
Please Read Carefully Before Proceeding Further
** The following questions (1 – 15) are all of multiple-choice type. For every question, four options (a), (b), (c) and (d) are given, of which only one is correct. Indicate the correct option on the OMR by filling the bubble.

** A correct answer will be awarded +3 marks and an incorrect answer will be awarded -1 mark. If the question is not attempted, no marks will be awarded.

1. The separation between neighbouring absorption lines in a pure rotational spectrum of the hydrogen bromide (HBr) molecule is 2.23 meV. If this molecule is considered as a rigid rotor and the atomic mass number of Br is 80, the corresponding absorption line separation in deuterium bromide (DBr) molecule, in units of meV, would be
(a) 2.234
(b) 1.115
(c) 1.128
(d) 4.461

2. A current source produces a square wave of V peak-to-peak voltage and is used to drive the RC circuit shown below. Which of the following represents the correct voltage across the capacitor C ?

3. A space telescope in orbit around the Earth discovers a new planet, which is observed to move around the Sun by an angle of 4.72 milliradians in a year. Assuming a circular orbit, estimate the distance, in A.U., of the planet from the Sun.

4. A system of particles occupying single-particle levels and obeying Maxwell-Boltzmann statistics is in thermal equilibrium with a heat reservoir at temperature T. If the population distribution in the non-degenerate energy levels is as shown in the table below, what would be the temperature of the system in degree Kelvin?

5. A beam of plane microwaves of wavelength 12 cm strikes the surface of a dielectric at 4/3. If the refractive index of the dielectric is 4/3, what will be the wavelength, in nits of mm, of the microwaves inside the dielectric?