JAM Question Paper 2019-20 PH (Physics) Previous Year Old Paper

JAM Question Paper 2019-20 PH (Physics).

JAM Question Paper 2019 PH (Physics) JAM PH – Physics 2019-20 Question Paper test papers will be fully objective type. This JAM PH – Physics 2019-20 Question will help all the students for their exam preparation, here the question type is MCQ i.e multiple choice question answers, if this JAM PH – Physics 2019-20 question paper in pdf file for IIT JAM PH – Physics you can download it in FREE, if Joint Entrance Examination (JAM) 2019-20 paper in text for JAM you can download JAM 2019-20 page also just Go to menu bar, Click on File->then Save.

JAM Question Paper 2019-20 PH (Physics)

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01. Which of the following is due to in homogeneous refractive index of earth’s atmosphere?

(A) Red colour of the evening Sun
(B) Blue colour of the sky
(C) Oval shape of the evening Sun
(D) Large apparent size of the evening Sun

02. The dispersion relation for electromagnetic waves travelling in a plasma is given as ω² = c²k² + ω²_p, where c and ωp are constants. In this plasma, the group velocity is:

(A) Proportional to but not equal to the phase velocity.
(B) Inversely proportional to the phase velocity.
(C) Equal to the phase velocity.
(D) A constant.

03. A plane in a cubic lattice makes intercepts of a, a/2 and 2a13 with the three crystallographic axes, respectively. The Miller indices for this plane are:

(A) (2 4 3)
(B) (3 4 2)
(C) (6 3 4)
(D) (1 2 3)

04. Consider Rydberg (hydrogen-like) atoms in a highly excited state with n around 300. The wavelength of radiation coming out of these atoms for transitions to the adjacent states lies in the range:

(A) Gamma rays (λ ~ pm)
(B) UV (λ ~ nm)
(C) Infrared (λ ~ um)
(D) RF (λ ~ m)

05. An object of mass m with non-zero angular momentum ℓ is moving under the influence of gravitational force of a much larger mass (ignore drag). Which of the following statement(s) is (are) correct?

(A) If the total energy of the system is negative, then the orbit is always circular.
(B) The motion of m always occurs in a two-dimensional plane.
(C) If the total energy of the system is 0, then the orbit is a parabola.
(D) If the area of the particle’s bound orbit is S, then its time period is 2mS/ℓ